Features: 1. With 2 USB sockets 2. With a voltmeter 3. Convenient to install and easy to use 4. Widely used for cars trucks cigarette lighter refit parts can match freely. 100% Brand New. Color: Black Size: 10.5 x 4.5 x 5.3cm (L x W x H); 1inch=2.54cm Input voltage:12V-24V USB Output: 5V 3.1A DC Double USB Output Current: 1A and 2.1A Measure voltage: 5 ~ 30V. Applicable Models: Cross bike, scooters, cars. 2 Port USB Socket + Voltmeter Socket Easy installation. Waterproof USB port, unique design for installation , USB waterproof cover. Package Content: 1 x 2 in 1 Waterproof USB Charger Adapter and Voltmeter Socket 1 set accessories