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 i - Phone, 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: 4.2Frequency Range :2.4GHz - Profile: A2DPTransmission Range: Up to 10M / 33ft - I/O 3.5mm Female Plug, Mini USB Female Port - Power Supply: DC 5VCharge Time: About 60 Min - Working Time: About 4H Package:1x Bluetooth Audio Receiver.1x 3.5mm to 3.5mm Adapter1x USB Charging Cable