Overview:

Universal, fully-wireless audio system for ski and snowboard helmets,Sport headband,Beanie hats.Connect them to your bluetooth device, drop them into any helmet/Beanie/headband. Play and pause, raise and lower volume, answer calls and skip tracks from its' three buttons interface, all without removing your mittens. Warm hands, total audio control, no wires, fresh powder, and whatever music you please.

Features:

Fully wireless, Bluetooth connecting,Built-in call functionality.

Fully portable,only 7.5cm in thickness,almost can not feel it on your ears even putting in

The thin sport headband.

Big bass, clear highs, clean sound.

Built-in rechargeable Li-Ion battery provides up to 8 hours of playtime. (USB charging cable included)

Specifications

Connection to mobile phones  through Bluetooth technology

Bluetooth Version:4.1+EDR(SIG member,QDID available)

Frequency: 2.402 GHz ~ 2.480GHz

Transmission distance: 10m (33ft)

Speaker driver:32 ohm/10mw

Frequency response:180-200KHZ

Battery:Li-polymer 4.2V/150mAh

Battery lasts up to: standby 6 days - conversation 15  hours;Play time: 8hours+

Sizes: universal

User manual