USE FOR 2-4S LIPO BATTERY PACK
OVER DISCHARGE WARNING CELL VOLTAGE 3-3.7V
ACCURATE SCOPE OF THE WARNING VOLTAGE +/-10MV

High precision 
Lipo: 2-4S 
LED display 
Small and easy to carry

Specifications:
Lipo: 2-4S 
Over discharge warning cell voltage 3.0-3.7v for lipo battery 
Accuracy scope of the warning voltage: +/-10mv 
Pins distance: 2.54mm

BB-4S Lipo Battery Voltage Tester, Low Voltage Buzzer Alarm

$3.90Price