Features: Battery capacity and voltage meter. LCD screen with green backlit. Long service life button with comfortable hand feeling. Equipped with a PVC film, the surface is waterproof. Built with buckle, free of screw installation. Universal battery capacity meter, need to set up by yourself. Functions: 1. Manually switch battery percentage / voltage / power off 2. Automatic recycling display battery capacity / voltage per 2 seconds (Settable) 3. 10s delay auto off (Settable) 4. Double discharge curve selection (Settable) Specifications: Color: Black Material: HTN / PCB Weight: 18g Size: Approx. 61.3 * 33.3 * 13.5mm / 2.4 * 1.3 * 0.5in Voltage: 6-70 (V) Applicable scope: Battery or battery equipment Storage temperature: -10 ~ 50 Setting Instruction: 1. Long press the Set key, power supply to the product, enter the setup interface 2. Press the Set key to select the battery specification (Lead acid battery(P), Lithium battery (L), Fe battery(F)) 3. Short press the Function key to select the number of battery strings (increasing for set button, decreasing for function button) 4. Long press the Function key to set s mode. Package List: 1 x Battery Capacity Voltage Meter with Connecting Cable Note: 1. Only support 12-48V battery, such as 12V P01 lead-acid battery, P04 lead-acid battery, and please note this item DOES NOT support 6V lead-acid battery. 2. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.