2. Model: RB-S3 3. Type: Clip on Bluetooth Headset 4. Bluetooth model: 4.1 5. Color: Black White 6. Compatible: Notebook, Tablet, Cellphone and other devices with bluetooth. Features: 1. Clip on Bluetooth Headset, fashion and practical. 2. Bluetooth 4.1, signal stability, remote transmission. 3. Bluetooth receiver and wired earphone provide pure stereo music. 4. Earphone give your ear comfortable feeling, when you're running, it is not easy to fall down. 5. With 3.5mm prot, you can connect it to other devices. 6. Hands-Free function, and can control the phone to take a photo. 7. Compatible with almost smart devices wtih Bluetooth.