Best Refurbished Parallel Printers

Wall Mounted Parallel Bars

Add 2 high-speed IEEE 1284 parallel ports (EPP/ECP/SPP/PS2) to your desktop computer through a PCI Express expansion slot.

Extreme Fast Print Speed-250mm/s: The printing speed of Ender 7 3D Printer is 250mm/s, which is nearly 5 Times faster than previous models. It is equipped with dual motors that work in parallel, so that the entire body can be better coordinated, so it can complete higher-level printing..
Newly-developed for Geek & Professional: This Ender 7 is specially recommended for Geeks & Professionals. It has more powerful functions than other models with the support of printing size-250 x 250 x 300mm and has a machine tool made of silicon carbide glass. The space of the machine tool has also increased to 4000 cubic millimeters. It is equipped with dual cooling system that can provide strong extrusion force when working..
Dual Cooling Fans: Ender 7 3D printer is equipped with dual fans, which can cool the machine in time and quickly during high-speed printing. Its fan is equipped with a high-performance butterfly-shaped wing air duct, so that this Ender 7 can inhale 169% more air than previous models. It can provide a good working environment for the machine, and make the extruded filaments smoother and more textured..
Core XY design: All stepping motors designed for Ender 7 Core XY printers are fixed, and the print bed moves vertically. This makes the tool head t....

This bundle contains Certified Refurbished Ring Video Doorbell Pro and Certified Refurbished Echo Show 5..
A Certified Refurbished Ring Video Doorbell Pro is refurbished, tested, and certified to look and work like new..
Works with Alexa to illuminate and send announcements to Echo devices when your doorbell is pressed or motion is detected, allowing you to hear and speak to visitors with two-way talk..
Lets you see, hear and speak to visitors from your phone, tablet and PC..
Sends alerts as soon as motion is detected or when visitors press the Doorbell..
A Certified Refurbished Echo Show 5 is refurbished, tested, and certified to look and work like new..
Compact 5.5" smart display with Alexa ready to help..
Manage calendar, make to-do lists, get weather and traffic updates, cook along with recipes..
Watch movies, news, and TV shows. Listen to songs, radio stations, and audiobooks..

Add 1 parallel port and 2 RS-232 serial ports to your standard or low-profile computer through a PCI Express expansion slot.

【Suitable For】This balance board can be used with all kinds of chargers( IMAX B8, UN A6, etc.)with balanced interface to provide balance charge less than 6 lithium batteries (6 batteries of 2S, 3S, 4S, 5S, 6S)that have same cells at the same time, which can avoid replacing the battery repeatedly..
【Function】The overall voltage is more balanced and the difference of average voltage is smaller after the individual cells have balanced..
【Application】This parallel charging board is compared with 6 times balance of single charge, once balance can shorten the charging time greatly, which has 6 times charging current and only needs 1/6 charging time with 6 battery packs in parallel..
【Safer】This parallel charging plate is coming with short circuit protection function (with 40A fuse)..
【Practical】This balanced charging board can supply balance charge for 1-6 batteries (containing Lipod, Life and Lion) in parallel and support 3 parallel charging boards for combined use to charge 18pcs batteries with the same nature simultaneously..

Quantity and material: you will get 4 pieces d size battery holders for physical science experiment or other use, sufficient quantity for you to use.
Made of plastic and metal, this d battery holder parallel is durable and can be applied for a long time.
How to use: these battery holders can be connected in a series to add voltage or in parallel to add current.
With spring clip design, you can easily put the battery in it.
Both ends of the box have positive and negative labels.
Easy to use: these durable individual plastic d-cell battery holders can be quickly and easily snapped together to form either parallel or series connections.
They can be applied individually or configured in parallel or series via the interlocking tabs located on the top and sides.
Product size: each d cell battery holder parallel is 7 x 3.5 x 2.7 cm/ 2.75 x 1.37 x 1.06 inch, fit for d size battery (not included).
Suitable for: plastic battery holder is suitable for teaching and laboratory use.
Children who are too small should use it under the supervision of an adult.