Model: K55
Transmission distance: 10m
Charging voltage: DC5V
Talk time: about 20 hours
Standby time: about 180 days
Version: V5.2
Transmission frequency: 2.4GHz
Charging time: less than 20 minutes
Music time: about 20 hours
Battery capacity: 140MAH
Body size: 56 (length) * 25 (width) * 13 (height) mm (including back buckle height 20)
Support protocol: Headset \ Handfree \ A2 DP \ AVRCP
Headphone*1 Charging cable*1 Spare headphone*2pcs Instruction manual*1