Specifications:
Model: MH04
Name: Motorcycle Helmet Earphone
Bluetooth Version: 5.0
BT version: 5.0+EDR
Frequency: 2.402GHz-2.480GHz
Range: 20-30 meters (depending on the surrounding environment of the equipment such as obstacles, etc.)
Microphone transmission distance: ≤ 1 meter
Lithium-ion battery: 3.7V/180mA
Play Duration: ≤ 8 hours
Charging voltage: 5V
Charging time: ≤1.5 hours
Standby time: ≤160 hours
Thickness of earphone:14MM(0.55inch)
Diameter of earphone:45MM(1.77inch)

Features:
-- Wirelessly listen to to music with integrated bluetooth technology
-- Hands free function, truly free your hand
-- Set-in rechargeable Li-ion battery, long stand-by and working time
-- 5.0 EDR Bluetooth Version, Hi-Fi earphone
-- Support power displaying on your Phone, easy to know when will to be charged
-- DIY design, available to be detacheable when you want
-- Sound reminderr function, easy to set the device according to sound remind

Package Includes:
1x Helmet Bluetooth Headset
1x Micro-USB to USB Charging Cable
1x User Manual