Hands free phone call
stereo music
smart voice control
color: black
polarized lenses
dimension: 155mm x 155mm x 43mm
net weight: 120g
operating environment: temperature: - 10 ~ 50 centigrade; humidity: 0 ~ 90%
charger specifications: ac 110v/220v 50/60hz, output: dc 5v max 1a
bluetooth: v3.0, support a2dp function
transmission distance: 10 meters
battery: rechargeable lithium battery (250mah/3.7v), about 2 hours for charging
conversation time: about 4 hours
music: about 2 hours
standby time: about 50 hour