Bluetooth Audio Receiver Version 4.2 Black Easy to Operate: Simply Connect Your Speaker/Headset with Our Device,  Immediately Transform Your Speaker/Headset Into a Fashionable Wireless Bluetooth Speaker/Headset with Handsfree Function Wireless Play: Removing Troubles of Wired Connection, through The Wireless Connection and Transmission, The User Can Enjoy a High Fidelity Music at Any Place Indoor by Wireless Control Portable Design: Mini Size with Clip Design The Feature of Portable Can Let  You Carry Them to Anywhere You Want Support for iPhone, Android Phone, Other Smart Phones Which with Bluetooth  A2DP Function Compatible with Home Stereos / Speaker, Car Stereos, Headphones That is with  3.5mm Audio Input Specification: Type: Bluetooth Audio Receiver Material: Plastic Bluetooth Version: 4.2 Frequency Range :2.4GHz Profile: A2DP Transmission Range: Up to 10M / 33ft I/O 3.5mm Female Plug, Mini USB Female Port Power Supply: DC 5V Charge Time: About 60 Min Working Time: About 4H  Package: 1x Bluetooth Audio Receiver. 1x 3.5mm to 3.5mm Adapter 1x USB Charging Cable