Description of bluetooth keys 1. Power on key/telephone connect/pause/play button 2. Volume up/next button 3. Volume down/up button 4. The microphones 5. USB charging port Bluetooth parameter information Frequency range: 20-20khz Sensitivity: 95DM Impedance: 32 ohms Transmission distance: CLASS Ⅱ Operating range: 10M Horn size: 32mm Charging time: 2H Duration: 3-6h Battery: 160-180ma polymer lithium battery Accessories: data cable + instruction manual Bluetooth protocol: 4.1 Bluetooth search name: bt-01
size:30*21cm weight:125g
Material: acrylic Accessories: USB data cable + instruction manual Bluetooth: 4.1 Product name: bluetooth knit cap