Features Good in Testing: Used for the auto testing of cell voltage and total voltage of 1S-8S lithium battery, practical and reliable. Digital Display: Clear digital display will show the working status as well as simplifying the setting and saving of set value. Safer for Using: When the volt is lower than the set value, the buzzer will sound and the red LED light will flash for safe work. Stable for Work: Designed to have wide measurement range and higher accuracy, the tester also has reverse connection protection. Easy to Install: Comes with a light weight and a compact size, all the 10pcs battery voltage tester can be quickly installed. Specification: Item Type: Lipo Battery Voltage Tester Material: PCB Function: For lithium battery testing. 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~30V Low Voltage Buzzer Alarm Mode: 2S - 8S Alarm Voltage Setting Range: OFF~2.5~3.8V Package List:10 x Lipo Battery Voltage Tester Package List 10 x Lipo Battery Voltage Tester