1.Twin wireless stereo bluetooth earphone 2.Wireless version: V4.2+EDR,low voltage 3.Speaker impedance: 32ohm 4.Microphone Sensitivity: 42Db 5.Frequency: 2.4GHz 6.Battery Capacity: 65Mah in 2 earphones/950mah in charging stand 7.Working Temperature: 10-55 degree 8.Input: DC 5V 9.BT transmission Distance: 12m 10.Playing time: 5-6hours 11.Charging time: 3-4 hours 12.Standby time:8 hours for charging stand 13.Support calling report 14.Compatible with IOS/Android Device 15.Color: white, black 16.Packing size: 8.1*4.1*13.1cm 17.One set weight: 103g 18.Included:one pair bluetooth earphones, case, manual and cord