Specificatoins:
1.Color: Black
2.Size: 8.5x 4.5x 4cm
3.Model: BT20
4.Material: ABS(Acrylonitrile Butadiene Styrene)
5.Baluetooth version: AC4601 V2.1
6.Bluetooth Protocol: AVRCP, HFP, A2DP
7.Frequency Range: 87.6-107.9MHZ
8.Frequency stability: ±10ppml
9.Product lnput: 12-24V
10.Music Format : MP3,wma
11.Micro SD Card(Max capacity): 32G
12.USB Disk(Max capacity): 32G
13.Product Total Output: 5V\/3.4A
14.Loop mode: Normal, Single cycle, Repeat all, Random
15.EQ: Classical, JAZZ, POP, ROCK, Vocal etc.

Features:
1.Wirelessly transmit phone call from Bluetooth mobile phone to the car FM stereo system.
2.Switch to Hands-free mode automatically from music playing status when receiving calls.
3 .Built-in Microphone
4. Dual usb Outputs 5v\/3.4A totally, charges ipod iphone ipad and other devices
5. support usb disk \/Micro SDcard
6. Strong and elegant design with led frequency display
7. With remote control
8. With voice prompts

Package Included:
1x Bluetooth device
1x User guide(The others are not included.)

Note:
1.Moist or underwater conditons.
2.Conditions near heater or high-temperature service.
3.Conditions with direct and strong sunshine.
4.Comditions with apt falling.