Product Specifications: - Model No.: JS-C33 - Product Size: 6.2 x 3.4 x 1.4 cm / 2.4 x 1.3 x 0.6 inches - Installation Size: 5.9 x 2.9 cm / 2.3 x 1.1 inches - Screen Size: 3.6 x 2.0 cm / 1.4 x 0.8 inches - Operating Voltage: 10V-100V - Working Current: 5MA - Sleep Power: 10UA - Operating Temperature: -10~55C - Backlight Color: Blue - Weight: 21g/Pc Package Includes 2 x Battery Capacity Monitor Features: 1. The red low power mark flashes to remind. Installation is simple, with a buckle, without screws. 2. Color LCD material, clear and clear display, displays the mild night. 3. Display the battery voltage, temperature, and capacity percentage in a single interface. Notice: The default setting is suitable for use in 12V lead-acid batteries.