Features: - Easy to Operate: Simply connect your speaker/headset with our device, immediately transform your speaker/headset into a fashionable wireless Bluetooth speaker/headset. - 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 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: - Bluetooth Version: 5.0 - 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 30 min - Working Time: About 4h - Size: 1.4 x 1.5 x 5.8cm / 0.5 x 0.6 x 2.3" (L*W*H) Package: - 1x Bluetooth audio receiver - 1x 3.5mm to 3.5mm adapter - 1x USB Charging Cable   Postage: Royal mail 1st class