Features Good test: used for automatic cell voltage and total voltage test of 1S-8S lithium battery, convenient and reliable. Safer to use: when the voltage is below the set value, the beep will sound and the red LED light flashes for safe work. Stable for work: designed to have a wide measuring range and greater accuracy, the tester also has reverse connection protection. Digital display: a clear digital display shows the working status and simplifies setting and saving the set value. Easy to Install - Comes with light weight and compact size, all 10 pieces battery voltage testers can be installed quickly. Specification: Item Type: Lipo Battery Voltage Tester Material: PCB Function: To test lithium batteries. Application: For 1S-8S lithium battery detection Voltage detection accuracy: ±0.01V. Group voltage display range: 0.5V ~ 4.5V Total voltage display range: 0.5V ~ 36V 1S test mode voltage range: 3.7V to 30V Low voltage buzzer alarm mode: 2S - 8S Alarm voltage adjustment range: OFF~2.5~3.8V Package list: 10 x Lipo Battery Voltage Tester Package List 10 x Lipo Battery Voltage Tester