& High Quality. Use for 1S-8S / Lipo / Li-ion / Li Mn / Li-Fe Battery. 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 buzzer with red LED light,pre-set value 3.3V. Push key which can change the voltage settings and save. Specification:Without Case Colour:Black Material:PCB+Components Package Contents: 1 x Low Voltage Buzzer Alarm Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.