Feature: 1. 4 Hours Battery Life: This audio bluetooth-compatible transmitter is suitable with 5.0 version and it has a 4 hour battery life. Sound quality is not compromised. It supports hands-free calling, is plug-and-play and has an AUX port. 2. Bluetooth-Compatible Transmission and Reception Modes: TX: converts audio to a Bluetooth-compatible signal via a cable and transmits it to a Bluetooth-compatible device for output; RX: receives the Bluetooth signal and transmits it to audio via a Bluetooth connection via a cable. 3. Sound Transmission: Connect this Bluetooth-Compatible 5.0 Receiver to your TV's 3.5 mm audio jack and transmit the sound to your headphones via Bluetooth. So you don't have to worry about disturbing your family while watching a film at night. 4. Wireless Playback: Speakers that do not have Bluetooth capability can be played wirelessly by connecting them to the 3.5mm audio port. Link the bluetooth connector to your car's AUX port via the wireless adapter and then connect Bluetooth to your car stereo. You can not only make calls but also listen to great music, so you are never alone on your journey. 5. Enjoy Lossless Sound Quality at CD Level: This car bluetooth-compatible receiver features high resolution restoration of lossless sound quality. It delivers a CD-quality music experience, so you can listen to your music in your phone; Bluetooth 5.0 listens to songs without delay. Low power consumption and a high and stable signal transmission rate make listening to songs even smoother. Specification: Certification: NONE Origin: Mainland China Interface: 3.5mm Wireless Type: bluetooth-compatible WIFI Standard: 2.4G Content: AUDIO High Definition Support: None Bluetooth-compatible version: 5.0 Transmission distance: 10m Output connector: 3.5mm audio Battery type: Built-in rechargeable lithium battery Usage time: 4 hours Indicator light: Support Size: 59.5 x 22 x 12mm/2.3 x 0.9 x 0.5inch Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you Please allow 1-2cm measuring deviation due to manual measurement. Packages: 1 x Bluetooth-Compatible 5.0 Transmitter