Motorcycle phone charger with voltmeter and fuse, waterproof motorcycle USB plug charger with switch, suitable for motorcycle handlebars with a diameter of 2.2 cm, single black USB plug (black)

【Product Name】: Miniature Black/Silver Steel Pistol Hole + Single USB Interface with Switch and Red Voltmeter 【Product Model】: ZH-975B1/ZH-975A1 【Net Weight】: 165g 【Gross Weight】: 241g 【Input Voltage】: 12V DC 【Cable Length】: 130cm (without extension) 【Measurable Voltage】: 6-38V 【Output Parameters】: 5V / 3.0A 【Voltmeter Color】: Red 【Operating Temperature】: -20°C to 80°C 【Materials】: Flame-retardant nylon + aluminum alloy 【Mounting Hole Diameter】: Less than 2.2 cm for optimal installation and use. Wiring: Connect the red wire to the positive terminal and the black wire to the negative terminal. Included accessories: 45 cm extension cable. Advantages: 1. This product is equipped with a QC3.0A charging interface for charging mobile phones, tablets, GPS devices, etc. 2. This product is equipped with a voltmeter to monitor the battery status and prevent accidents related to battery failure. 3. An independent switch allows simultaneous control of the USB port and the voltmeter, activating them instantly. 4. Aluminum alloy casing, red digital voltmeter, fine workmanship, and overall high-end appearance.