Best Dual Frequency Technology

Shure UR24D/Beta58 Dual Handheld Wireless System H4

  • 2400 Selectable Frequencies Across 60 MHz Bandwidth.
  • Up to 60 Preset Compatible Systems/Band (140 w/Multiple Bands, Region Dependent).
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Shure UR24D/SM58 Dual Handheld Wireless System H4

  • 2400 Selectable Frequencies Across 60 MHz Bandwidth.
  • Up to 60 Preset Compatible Systems/Band (140 w/Multiple Bands, Region Dependent).
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Newest Acer Aspire 5 15.6\ FHD Laptop - 4-Core AMD Ryzen 3 3350U - Radeon Vega 6 Graphics - 20GB DDR4 - 1TB NVMe SSD -FP Reader -RJ45 -WiFi 6 - Backlit KB - Windows 11 Home w/32GB USB

  • Latest AMD Ryzen 3 3350U processor (4 Cores, 4 Threads, 4M L3 Cache), base frequency 2.10 GHz, max turbo frequency up to 3.5 GHz with Precision Boost.
  • 【Customization】Upgraded to 20GB DDR4 SDRAM, 1TB NVMe Solid State Drive and 1TB HDD hard disk, No Built-in DVD, Windows 11 Home.
  • Two-sided narrow borders screen, 15.6" diagonal FHD (1920 x 1080) IPS Display powered by AMD Radeon Vega 6, 82.58% screen-to-body, 16:9 aspect ratio.
  • Dual built-in microphones using Acer Purified.Voice Technology.
  • Wi-Fi 6 (IEEE 802.11ax 2x2 160MHz enables 2402 Mbps maximum theoretical data rates, Dual-Band 2.4GHz and 5GHz featuring MU-MIMO technology, 10/100/1000 Mbps Ethernet LAN) + Bluetooth 5.1.
  • 1x Ethernet (RJ-45), 1x HDMI 2.0 with HDCP support Outputs, 1x USB 2.0 Ports, 2x 3.2 Gen 1 Type-A Ports, 1x 3.2 Gen 1 Type-C Ports (up to 5 Gbps), 1x Headphone speaker line-out jack.
  • Fingerprint Sensor, Backlit fullsize keyboard with NumPad and Multi-touch Gesture TouchPad.
  • 2-cell 45 W Lithium Ion (Li-Ion) battery.
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PHILIPS FX10 Bluetooth Stereo System for Home with CD Player , MP3, USB, FM Radio, Bass Reflex Speaker, 230 W, Remote Control Included

  • Stream music wirelessly via Bluetooth from your smartphone - Bluetooth is a short range wireless communication technology that is both robust and energy-efficient. The technology allows easy wireless connection to iPod/iPhone/iPad or other Bluetooth devices, such as smartphones, tablets or even loptops. So you can enjoy your favorite music, sound from video or game wireless on this speaker easily..
  • Dual amplifier for better sound performance - Dual amplifier ensures enhanced sound performance by reducing inter-modulation between the woofer and tweeter, since each transducer is driven by its own dedicated amplifier. The result is deep and powerful bass sounds that have high impact without interfering too much with the higher frequencies so they remain pure and detailed. Utilized in combination with precise, active crossover design, better control on the phase and frequency response of each.
  • MAX Sound for instant power boost - MAX Sound technology produces an instant boost in bass, maximizing volume performance and instantly creating the most impressive listening experience with just the touch of a button. Its sophisticated electronic circuitry calibrates existing sound and volume settings, instantly boosting bass and volume to maximum levels without dis....
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Rigol DG822-25 MHz Function/Arbitrary Waveform Generator, 2 Channel

  • Unique SiFi II (Signal Fidelity II) technology: generate the arbitrary waveforms point by point.
  • jitter of all the output waveforms (including Sine, Pulse, etc.) as low as 200 ps.
  • 16 Mpts memory depth per channel for arbitrary waveforms.
  • Standard dual-channel with the same performance, equivalent to two independent signal sources.
  • Built-in high-order harmonic generator (at most 8-order harmonics).
  • Built-in 7 digits/s, 240 MHz bandwidth full featured frequency counter.
  • Up to 160 built-in arbitrary waveforms, covering the common signals in engineering application, medical electronics, auto electronics, math processing, and other various fi elds.
  • Sample rate up to 250 MSa/s, vertical resolution 16 bits.
  • Arbitrary waveform sequence editing function available.
  • arbitrary waveforms also can be generated through the PC software.
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JVC HASR50X XX Xtreme Bass Headset, Black

  • Dual Extreme Bass Ports" and 40mm Neodymium driver units deliver ultimate bass sound.
  • In-line 1-button remote & mic for iPhone / Android / BlackBerry.
  • Robust body with anti-impact "Tough Protectors.
  • Soft Padded headband and ear pads provide comfort during extend use.
  • Frequency Response - 8-23,000Hz , Impedance - 16ohms.
  • Included components: 1 headphone set, 1 each.
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HiFiGo LETSHUOER x GIZAUDIO Galileo Dual-Driver Hybrid in-Ear Monitor, 10mm Dynamic Driver + Balanced Armature Unit IEMs in-Ear Earphones (4.4mm Plug)

  • Precise & Reliable 3D Printed Acoustic Cavity Structure: The acoustic cavity structure of Galileo earphones is designed with high-precision 3D printing technology. The complex acoustic cavity is molded with resin materials simultaneously to achieve more accurate physical frequency division..
  • Synthetic resin panel from the starry sky: Galileo uses an ink-painted synthetic resin panel, with azure blue, dark brown, and silver-white complementing each other as if the Milky Way and stars are fixed in it. With the surface treatment of actinic resin, each earphone has a unique brilliance flow, which is as eye-catching as the twinkling stars..
  • 10mm liquid silicone & Al-Mg Alloy Dynamic Driver + Sonion 2389 balanced armature + electronic independent dual-frequency crossover: In order to meet the pursuit of excellent sound performance, Galileo houses a 10mm liquid silicone + Al-Mg alloy dynamic driver unit and a Danish Sonion 2389 balanced armature driver unit as the core configuration. The pair is designed with an independent electronic frequency division and cavity for each driver unit. The tube ensures a precise sound phase and extremely low distortion in the outpu....
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Rockville REQ231 Dual 31 Band 1/3 Octave Graphic Equalizer+3 Way Mono Crossover

  • ...z effective equalization range. Constant Q filters. Selectable 6dB or 12dB cut or boost range.
  • Output level LEDs (-10 to +17 dB). Bypass switch with status LED. Ground lift switch. Balanced XLR input/output. Subwoofer out. Channels: 2 (stereo). Connectors: XLR balanced inputs and outputs. Bands: 31 per channel. Frequency Centers: 20 Hz, 25 Hz, 31.5 Hz, 40 Hz, 50 Hz, 63 Hz, 80 Hz, 100 Hz, 125 Hz, 160 Hz, 200 Hz, 250 Hz, 315 Hz, 400 Hz, 500 Hz, 630 Hz, 800 Hz, 1 kHz, 1.25 kHz, 1.5 kHz, 2 kHz, 2.5 kHz, 3.15 kHz, 4 kHz, 5 kHz, 6.3 kHz, 8 kHz, 10 kHz, 12.5 kHz, 16 kHz, 20 kHz.
  • Control Range: Selectable +/-12dB 0r +/-6dB. Input Impedance: 50k ohms. Output Impedance: 600 ohms. Maximum Output Level: +21dB. Level Control: +/- 10 dB. Signal to Noise: >93 dB. Distortion: 0.005%. Roll-off filters: 18dB/octave, Butterworth. Power Consumption: 15 watts. Weight Unpacked: 7.00 lbs. Weight Packed: 9 lbs. Width Packed: 5.87". Height Packed: 20. 5". Depth Packed: 9.62". Features of RX230: RockvilIe RX230 2-way Stereo / 3-way Mono rack mountable crossover.
  • Ability to mix 2 channels output. 24dB/Octave filters. Mute switches. Channel Gain Control: 0 to +12 dB. Low Frequency Level Control: -to +6 dB. High Frequency Level Control: -to +6 dB. Low Frequency to High Frequen....
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Radio Frequency Skin Tightening Facial Machine, Professional Home RF Anti Aging Device, for Face and Body

  • [SEWDY Skin Tightening Machine] The SEWDY High Frequency Facial Machine uses the latest sonic penetration technology to deeply cleanse skin impurities and promote the absorption of nursing nutrition, which can make you more beautiful and younger..
  • [Dual Probe Design] SEWDY's high frequency facial machine is equipped with 2 probes(the inside of the probe is made of ceramic material).
  • [Energy Level and Adjustment Mode] SEWDY high frequency facial skin device has 6 energy levels: (level 1-2 for eyes, level 3-4 for face, level 5-6 for body parts) to suit different skin sensitivities. 3 adjustment modes: import mode, eye care, detox export, suitable for all skin types. The default time is 20 minutes, and the countdown will start when you use it, letting you know the remaining usage time when you use it..
  • [The Visible Effect] According to the data of SEWDY beauty experts and 12 years of cooperative laboratory experience, the change cycle of human skin is 28 days. 29% saw visible results within 3 weeks of using the SEWDY Skin Firmer, and 49% saw visible skin improvement within 6 weeks..
  • [Beauty SPA for Family] After owning the SEWDY radio frequency skin tightening device, there is no need to go to the expensive and time-consuming beauty center again. Enjoy the ....
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Phenyx Pro Wireless Microphone System Dual Wireless Mic Set with Handheld Microphone/Bodypack/Headset/Lapel Mics 2x100 UHF Channels 328ft Range Cordless Mic for Singing Karaoke Church PTU-71B

  • PREMIUM WIRELESS PERFORMANCE: Dual UHF cordless microphone system with selectable frequency. Channel 1: 538.3 - 566.5Mhz (100 channels). Channel 2: 571.3 - 599.5MHz (100 channels). The microphone wireless system employs PLL frequency synthesized technology to provide hassle-free sound transmission, minimum dropouts, and maximum feedback rejection. Smooth and quick IR synchronization. Long range operation for this microfono inalambrico set of 290ft – 328ft line of sight.
  • STURDY BUILD, MULTICHANNEL FEATURE: Sturdy metal builds for wireless receiver, dynamic handheld microphone and bodypack. The endurable cordless mic is equipped with cardioid dynamic cartridge that engineers for clear robust optimal true sound. Full range response & great reproduction of vocal tone. The multichannel feature enables users to select different frequencies when preset frequency fails, ensuring interference-free reliable operation & allowing multiple systems used simultaneously.
  • AUTO SCAN FEATURE AND ANTI-INTERFERENCE FEATURE: The wireless headset lapel microphone system equips with auto scan function, which enables system to search for the least interference channel to sync. The wireless DJ microphone system also has lock function to lock selected frequency. With w....
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