For 1-8S LiPo, Li-ion, LiMn, Li-Fe batteries. Test the working state of lithium battery. Low voltage alarm mode for 2-8S. When the voltage is below the set value, it will buzzer with red LED light, pre-set value 3.3V. Push key which can change the voltage settings and save. Product parameters: 1. For 1S-8S lithium battery detection. 2. Voltage detection accuracy: 0.01V. 3. Group voltage display range: 0.5V~4.5V. 4. Total voltage display range: 0.5V~36V. 5. 1S test mode voltage range: 3.7V~30V. 6. Low voltage buzzer alarm mode 2S - 8S. 7. Alarm voltage setting range: OFF~2.7~3.8V. Delivery Quantity: 2pcs. Dimensions: 40mm x 25mm x 11mm. Colour: as shown in the picture. Package content: only the above package content, excluding other products. The size is measured manually, please allow 1-2 cm measurement error. Due to different displays and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.