auris freeDa Bluetooth&reg; Music Receiver for the Dock Wirelessly play and control all your music from an iPhone, iPad, Android or any Bluetooth enabled device. Bluetooth 4.0 for fast device pairing and low power consumption. Remembers up to 8 paired devices. Wireless range up to 33 feet. Automatically reconnects to the last paired device. AptX coding delivers full wired audio quality over Bluetooth with an impressive dynamic range. The AUX 3.5mm line out enables to connect to the car stereo, amplifier, headphones, etc. with AUX 3.5mm cable (included). Rechargeable Lithium-ion battery. Battery Life: 12 hours approx. Standby Duration: 10 days approx. Battery meter automatically displays on the status bar of compatible devices (iPhone, iPad, etc.)