Features: 1. Brand -quality products, with stable and reliable quality. 2. Made of high-quality materials, durable and practical, small in size, simple in application, and easy to install. 3. Low power consumption, long working life, high temperature resistance, and vibration resistance. 4. With a setting button, various batteries can be set and alarm values can be set. 5. The surface is waterproof and has no problem when it (without soaking), with powerful functions.Color LED display screen, durable, reverse connection protection, low power alarm. Specifications: Current consumption: Less than15mA Working voltage: 6-120V Working temperature: -20~+70C Wiring : red positive, black negative This meter comes with an 85cm long sheathed cord. It can be used after connecting the positive and negative. Lead-acid battery Lead-acid batteries are generally 12V. For example, 4 batteries use lead-acid 48v. It's the model number, it doesn' mean it can only display 48v. The internal parameters of this electricity meter are set to the factory default setting of 48V lead-acid battery (4-cell 12V battery) power and voltage cycle display. Setting example: For example, if the lead-acid 48V is set, the display mode is to only display the percentage. The settings for a 48V lead-acid battery (4 cells of 12V in series) are as follows: select 12.0V in 2-b, select 4 in 3-c, and select % in 4-d. Material: Aluminum alloy colour: Black+silver Package Contents: 1 x Voltage and electricity meter 1 x Pipe clamp 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.