niceEshop(TM) Mini USB Bluetooth 3.5mm Stereo Audio Music Receiver for iPad Smartphone Transmission distance: up to 10 meters (about 32.8 feet) Bluetooth version:V2.0 (2.4GHz-2.4835 GHz) 3.5 standard audio output interface;USB power supply audio output interface Compatible with any car stereo or speaker with 3.5mm audio socket Type:Non-OEM generic product,Apple does not endorse use of these products