Product features:
    Bluetooth version: Bluetooth V4.1 + EDR
    Supported: AVRCP, A2DP, HSP, HFP
    Call time: 3-4 hours
    Standby time: 100 hours
    Operating range: 10m
    Charging time: 2 hours
    Charging voltage: 5V DC
    Dimensions: 65.5*4.9*8.9mm
    Weight: 5.81g
    Colors: gold
Product functions:
    One for two
    Answer, reject, hang up
    Music play
    Up/down control
    Voice dialing
    Redial last number
    Battery display for iPhone
    Voice report calling number