New & High Quality. Designed for 1S-8S Lipo, Li-ion, Li Mn, and Li-Fe batteries. Voltage detection precision: 0.01V. Unit voltage display range: 0.5V4.5V. Total voltage display range: 0.5V36V. 1S test mode voltage range: 3.7V30V. Low voltage alarm mode for 2S8S configurations. Alarm set value range: OFF, 2.7V3.8V. When voltage drops below the set value, the device emits a buzzer alert with a red LED light; default preset value is 3.3V. Equipped with a push button to adjust and save voltage settings. Available specifications: With Case or Without Case. Color: Black. Material: PCB and electronic components. Package includes: 1 x Low Voltage Buzzer Alarm Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting effects and display settings may cause slight variations in color between the product image and the actual item. Measurement allows an error of +/- 13 cm.