Specification:  Basic Parameter:  Material: ABS+silica gel.  Lens: A Three-layer coating anti-blue ray lens, high hardness anti-scratch.  Weight: about 41g.  Colour: Black.  Hardware parameter:  Chipset supplier: JieLi.  Chipset: AC6936d.  Speaker: 1506.  Microphone: MEMS MIC.  Battery Type: Lithium polymer.  Capacity: 110mAh.  Connection parameter:  Bluetooth: 5.0.  WIFI: N.A.  NFC: N.A.  Compatible system: IOS、Android.  Other Partmeter: Charging method: USB.  Charging time: about 2-3H.  Waterproof Level: N.A.  Call time: about 4-5H.  Music time: about 4-5H.  Standby time: About a week.  Product language: English/Chinese.  Major function: Bluetooth call/Bluetooth music/ AI/Anti-blue lens.  Control: One key(right).  Packing Partmeter:  Package size（L*W*H): about 180*75*55mm.  Package weight: about141g.  Operation:  Start up: press and hold the function key 3S.  Shutdown: press and hold the function key 3S.  Answer call: Click the function key.  Hang up: Click the function key.  Decline call: press and hold the function key 2S.  Play/Suspend music: Click the function key.  Wake up Siri: press and hold the function key 2S.  Adjust the volume: Click '+' button to increase volume; Click '-' button to reduce volume.