Features:
1. Dual USB output, charing 2 devices at the same time.
2. Built-in bluetooth chip enables free swtich of music and calls.
3. One touch hands-free calling, navigation broadcast.
4. Support U disk playback.

General Specification:
Brand: ROCK
Model: B300
Color: Black
USB Port: 2
Dimensions: 45*30*90mm

Technical Parameters:
Input: DC 12-24V
Output: USB 1: DC 5V/1A
USB 2: DC 5V/2.4A
Bluetooth Version: 4.2
USB Capacity: ≤32GB
Compatible: IOS, Android

Package Included:
1 * ROCK B300 3.4A Bluetooth 4.2 Handsfree Calling FM Transmitter Digital Monitor Dual USB Car Charger