Feature: 1. Waterproof Exterior: The exterior of this meter is with PVC film, waterproof, and wear and corrosion resistance, you can not worry about it being damaged on the wall after you install it. 2. Security Protection: The black meter has a stylish appearance and also has a security protection capability, such as reverse connection protection, which can ensure that the coulometer is not burned when the reverse connection is made. 3. Easy Connecting: The meter is very safe and easy to connect, just follow the normal process to install successfully, sturdy and durable. 4. Multiple Function: Our meter is also multifunctional, it can observe voltage, battery percentage, have backlight, sleep mode, battery type selection and so on. 5. Light Weight: Our meter is compact in design and light in weight, very portable, you can carry it around with you at any moment and put it to work. Specification: Item Type: Battery Capacity Meter Model: LY7S Input Voltage: 8-63V Ambient Temperature: -20 to 50℃ Voltage Measurement Error: 1%. Package List: 1 x Battery Monitoring Meter 1 x Connecting Wire