•Transmitter Mode Plug into any audio jack to use wireless headphones or earbuds in places that only have a headphone jack, like airplanes and treadmills. •Double Aux adapter included for international flights •Receiver Mode: connect to aux port in your car stereo system to and receive audio signals from your mobile phone, tablet, laptop, and more! •Enjoy up to 10 hours of uninterrupted use •RECHARGABLE: LED indicator ring to show power levels, re-charge with the included cable •Includes: (1) Audio Transmitter & Receiver, (1) USB-C Charging Cable, (1) Aux Cable, (1) Airplane Aux Adapter, and (1) User Manual The Monster Rechargeable Audio Transmitter & Receiver is a compact transmitter that enables wireless headphone use with any standard audio jack From in-flight entertainment systems to your car stereo. The receiver mode Connects a Bluetooth device to a non-Bluetooth device. Stream music from a phone to a car speaker or enjoy hands-free calls. Weight: .3 Pounds Volts: 0 Volts Cable/Cord Length: 1 Feet Electronics Features: Device Detection Connection Type: No Wired Connection Ports Battery: Lithium Ion, Required, Included