Mini Wireless Music Audio Receiver Adapter BT 4.1 for Car Hands-Free Calls Better Music Listening 3.5mm Stereo Output for Car Stereo Sound System Speakers Headphones Earbuds

Features:
Wireless Audio Receiver: Designed for home speaker/car stereo/stereo headphone with 3.5mm input interface and without BT connection function. With this audio receiver, you can enjoy the music or hands-free calls of the mobile phone through the speaker/car stereo/headphones.
BT 4.1 Connection: Adopts BT 4.1, which provides more stable and faster audio signal transmission and let you enjoy better music and clearer sound. Transmission range is around 10 meters.
Built-in Microphone for Hands-free Calls: Equipped with microphone inside, you can press the button on the surface to answer/reject the phone calls easily while driving, very safe to use.
Dual Link for More Flexible Usage: Supports connecting 2 BT devices at the same time, you can enjoy your music and won't miss any calls, or listen to music or audio navigation simultaneously.
Other Features: mini size, easy to carry and very space-saving; built-in lithium battery and can be easily recharged via the included USB cable.
 
Specification:
BT version: BT 4.1
Frequency range: 2.402GHz-2.480GHz
Output power class: CLASS2
BT range: around 10 meters
BT protocol: HFP HSP A2DP AVRCP
Working voltage: DC 3.0-4.2 V
Working current: 15mA
Battery capacity: 110mAH
Charging voltage: DC5V
Item Size: 5.2 * 2.8 * 0.8cm/ 2 * 1.1 * 0.3in
Item Weight: 10g/ 0.4oz
Package Size: 15.5 * 9 * 2cm/ 6.1 * 3.5 * 0.8in
Package Weight: 78g/ 2.8oz

Note:
The smartphone showed in the picture is not included.

Package List:
1 * Receiver
1 * 3.5mm Adapter
1 * USB Charging Cable
1 * 3.5mm Audio Cable
1 * Users' Manual(English)