Wired to Wireless Connect Multiple Devices: Convert wired audio to Bluetooth signal make the audio output via Bluetooth receiver Use for Car Vehicle Navigation/Hands-Free Talking/Music Entertainment: Say goodbye to the danger of answering the phone while driving with one hand one-click hands-free function, for safe call answering Built-In Bluetooth V5.3 Powerful Chip Escort the Sound Quality: Adopt a professional audio chip, with Bluetooth 5.3 protocol, which makes audio analysis ability stronger, lower delay speed, and more stable signal transmission Strong Expansion More Fun: Built-in TF card slot, you can listen to music freely without taking your mobile phone outside ABS material: Lightweight and durable, exquisite, compact, and easy to carry when going out Specifications: Model: W2 Material: ABS Battery capacity: 120mAh Size: 4.6 x 3.1 x 1.6cm Product weight: about 10g Playback time: about 6 hours