???Features:
Using the matchbox-size unit is just as easy as pie.
Comes with multi-function button: Power On / Off / Pairing.
The transmitter mode and receive mode are simply one-button switchable.
Standard 3.5mm audio socket and cable enable to connect to most modern audio device.
Small and portable. Simple use， perfect sound quality.

Specification:
Bluetooth: Support V1.2 ，V2.0，V3.0，V4.0
Chipset: CSR 57E6(Blutooth transmitter); OVC3960(Blutooth receiver)
Transmission Distance: 10m / 33ft
Battery: Rechargeable Li-polymer battery(280mAh)
Working Time: 10 Hours
Charging Time:2.5 Hours
Bluetooth profile supported: A2DP and AVRCP
Switchable Mode: RX/TX
Audio Port: 3.5mm
Color: Black
Material: ABS
Dimension: 4.5 * 7 * 1cm / 1.8 * 2.8 * 0.4in
Weight: 25g / 0.88oz
Package size: 11 * 7.4 * 2cm / 4.2 * 2.9 * 0.8in
Package weight: 78g / 2.75oz

Package List :
1 * 2 in 1 Bluetooth audio Transmitter & Receiver
1 * 3.5mm Audio Cable
1 * 3.5mm Stereo Audio Cable
1 * Charge Cable
1 * User Manual(English)