Universal Compatibility: Via its 3.5mm aux jack, this device can connect to a wide range of audio devices, such as car audio systems, speakers and projectors Portable Size: This compact, lightweight adapter is perfect for use on the go. Whether you're in a car, or at home, you can easily plug in and enjoy your audio content wirelessly Easy to Use: With its simple plug-and-play design, this Bluetooth transmitter receiver is easy to use. Simply plug it into your device's auxiliary port, connect your Bluetooth device, and enjoy wireless audio streaming Clear Stereo Sound: With its noise cancelling chip, making you enjoy crystal-clear high-quality stereo sound with this Bluetooth adapter. Whether you're listening to music, watching a movie, or making a call, you'll experience superior audio quality Specification: Material: ABS+PC+TPU Interface: 3.5mm male, Type-C female Bluetooth version: 5.1 Bluetooth pairing name: ES-BT10 Transmission distance: 10m Working frequency: 2.402G-2.48G Working power: +6dbm Battery capacity: 140mAh Charging power: DC 5V/150mA Charging time: 1.5h (the indicator light turns red when charging and turns off when fully charged) Transmitter music playback standby time: 7h Receiver music playback standby time: 8h Size: 19.95*12.05*96.69mm Weight: 11.5g Product selling points: dual-mode universal, powerful performance Bluetooth 5.1 chip, multiple noise reduction technologies, rechargeable battery built in