LiPo Battery Checker RC 1-8S Battery Tester Low Voltage Buzzer Alarm Description: Lipo Battery Low Voltage Tester Checker 1S-8S Buzzer Alarm with LED Indicator for RC Helicopter for RC Drone / Helicopter / Boat / Plane Easy to use - works with any 1-8S Lipo/Li-Ion/LiMn/Li-Fe RC drone battery. Protect the battery from overcharging and overdischarging Just plug into the balance plug and the LED will cycle through the individual cell voltages as well as list the total voltage You can set the alarm from 2.7 to 3.8V per cell or you can turn the alarm off Super loud alarm sound makes it easier to find your drone Specifications: Voltage detection precision: 0.01V Unit voltage display range: 0.5-4.5V Total voltage display range: 0.5-36V 1S test mode voltage range: 3.6-32V Low voltage alarm mode for: 2-8S Alarm set value range: OFF-2.7-3.8V Display: LED Weight: 11g Size Chart: Size: approx. 40x25x11mm/1.57x0.98x0.43inch Package Includes: 1 Piece LiPo Battery Checker