KKmoon BM-E9 Mini 3.5mm Bluetooth Wireless Audio Receiver A2DP Stereo Dongle for Smartphone Tablet Speaker Bluetooth audio receiver with 3.5mm audio plug, upgrade the normal speaker(with 3.5mm AUX IN port) into Bluetooth-enabled speaker, enjoy wireless music freely! Bluetooth 3.0, Support A2DP/HSP/HFP protocol, compatible with for iPhone/iPad/iPod Touch/Mac, Bluetooth-enabled Android smartphone/tablet. Plug and play, no need installation. Built-in rechargeable li-battery, can work about 4 hours after fully charged. Compact size, portable and lightweight.