Features:
Brand New & High Quality.
Function of checking your lipo cells voltage
Voltage display function and low voltage alarm funtion.
Use for 1-8s Lipo/Li-ion/LiMn/Li-Fe.
Protect the battery from overcharging or overdischarging
Test the working state of lithium battery
Automatic protects against reverse connection

Specifications:
Voltage detection pricision: 0.01V.
Unit voltage display range: 0.5V-4.5V.
Total voltage display range: 0.5V-36V.
1S test mode voltage range: 3.7v-30v.
Low voltage alarm mode for 2-8S.
Alarm set value range: OFF-2.7V-3.8V.
When the voltage is below the set value,it will buzzer with red LED light,pre-set value 3.3V.Push key which can change the voltage settings and save.
Package size: 6 * 4 * 1cm / 2.4 * 1.6 * 0.4in
Package weight: 25g / 0.9oz

Package list:
2 * 1-8S Voltage Buzzer Alarm