Bluetooth Receiver, DIZA100 Music Wireless Receiver Streaming Adapter & Hands-Free Car Kits, for Smartphones/Home/Car Audio Stereo System Bluetooth version: Bluetooth V4.1+EDR Class 2;Bluetooth profiles: A2DP& AVRCP. Power supply: Inner Li-Battery charging via Micro USB cable. Effecdtive range: up to 33 feet(10meters) away. Stereo audio output:Use with home stereos,speakers,car stereos,headphones(etc) by 3.5mm stereo inlet socket. Wireless music receiver connects to 3.5mm headphone jacks; Operation time: up to 8 hours