About the product1. Full metal(aluminium) body, concise and classic appearance. 2. Round small shape, lightweight and portable, the size is 52 * 52 * 25mm, and the weight 58g, you can carry it with you in your pocket. 3. Professional speaker, noise reduction processing, high quality timbre with vigorous bass and ringing high pitch. 4. Bluetooth 4.0, good compatibility. Compatible with most of the mobile phones, tablets and computers. Effective range of bluetooth is about 10 meters. 5. Built-in microphone, you can talk with the microphone when the call in, the call sound is clear and load. 6. One button at the speaker bottom only, simple to use: Power on / off: long press the button for 3 seconds to turn it on or off; Priring: double click the button after you power it on, then search the bluetooth on your phone and finish pairing, then enjoy the music or talk; Play / Pause the music: short press the button when the music is playing; Answer call: short press the button when the call rings; Hang up the phone: short press the button when the call finished. 6. Rechargeable with the USB charging line(the interface is Micro USB). Please fully charge it before first use. 7. Equipped with lanyard hole, you can hang it on your bicycle when you are cycling, or tie it to trouser belt to enjoy your music or talk.