EZ Grow Systems 5 in 1 Multifunctional Water PH TDS Meter Salt Water and Drinking Test Kit Pool and Aquarium Water Hardness Tester PH Up and Down Digital Stable.
2 packs x 10 = 20 pieces of AG13 alkaline watch coin cell batteries..
Digital Stopwatch, BESTWYA Large Screen Handheld Count Up Timer with Time Calendar Clock Function
...to operate with 3 keys to control: Reset, Start/Stop and Mode. It has 1 group of count up function (1/100 sec, Maximum : 23 Hour 59 Min 59 Sec ), time(12/24), calendar, week and 1 group of daily alarm (About 70 dB). Suitable for running, swimming, training, tracking match, competition, athletics, etc.
Easy to Change Battery - For most stopwatches on the market, when the battery is almost exhausted, you need to lift the back cover to replace the battery. More than 4 recessed screws are not what you consider easy access. For our stopwatch, you just need to use a coin, a flat key or even your thumb to rotate the back cover 90 degrees counterclockwise to take out of the back cover. Only powered by 1 AG13 button cell.
Lightweight and Easy to Carry - The Stopwatch is made of hard plastic and is extremely light weight. Each stopwatch comes with about 40" black lanyard that is tied at the end. You can take it with 1 hand , put it in your pocket , or Stowed around the neck with the lanyard.
Note: It is some sort of water- resistant, not waterproof. Please don’t sink it to the water. The beep is very quiet that you'd notice it in quiet environments. Each stopwatch comes with a button cell in its compartment and 1 spare button outside. You have no worry about it....
ULTRA SAFE 3V BATTERIES - cr2450 battery 0 % mercury and each battery is separated packaged, cr 2450 battery is designed not to Leak in Devices During their Usage. child-secure packaging makes Tyrone Lithium Coin battery packaging nearly impossible to open without scissors..
LONG-LASTING BATTERIES - Ours 2450 lithium battery deliver the long-lasting power and performancewith, you can use your electronic devices wherever you want. our coin battery will last 10 years when unused and properly stored and 5 years warranty life, premium performance in the battery industry..
GRADE A BUTTON BATTERY - Tyrone cr2450 made of the highest quality materials, A-grade batteries are more durable, safe than normal batteries and thus trusted by most people..
RELIABLE POWER - CR2450 3v lithium coin cell battery ideal for watch, garage door opener, tea lights, votive candles, home security systems, alarm system, car key fob, remote control, calculators, toys, games, smart devices. (Please confirm whether the battery model required by your device is CR2450.).
