Features: *LED display real-time voltage monitoring. *Two USB port to recharge two mobile devices at the same time、 to charge your device is not to wait. *Shows the car battery voltage. *Double USB 3.4A quick charge. Specifications:          General Specification             Brand       Remax             Model       RCC-208             Color       Black             USB Port        Two             Product Weight (kg)       50g             Dimensions (cm\/ inch)       6*2.2*2.2cm           Technical Parameters             Total Power       17W             Input       12-24V             Output        DC 5V 3.4A             Unique Tech       The red light display shows voltage、 detecting battery are healthy    Package  Included:                     1 X Remax Car Charger           1 X Manual