Feature：1，Music or call switching， free and relaxed. Super clear and flow conversation effect2，Simple and Easy Wireless Set-Up， Automatically connect3，Normal speaker become hands-free Bluetooth speaker magically， portable for vehicle mounted systems.4， Over length receiving distance， can reach up to 33 feet in open space without cables.5，，Extra-long built-in battery provides up to 8 hours playing time and only need 1.5 hours to charge it fully. Package include 1 x Bluetooth Receiver 1x USB Cable 1x Instruction Manual NOTE: This is a receiver not a transmitter.