Product Category:Headset Maximum Intercom Distance: 500-1000m Power Supply Mode: Built-in Battery Special Features: Description Connection Mode: Bt Model Name: Headset Product Name: BT Headset for Motorcycle Helmet BT Version: V4.0 + EDR Frequency range: 2.4026 GHz-2.480 GHz Transmission distance: 10M (transmission distance varies with environmental factors and BT devices on mobile phones) MIC Distance: Under1 M Lithium battery: 3.7V/500mA Charging time: 4-5 hours Standby time: about 180 hours Continuous working hours: about 32 hours Packing Weight: 173G Product functions: listening to music, answering calls, voice navigation, voice calls Scope of application: Most of them can only support mobile phones, compatible with digital devices such as iPad, notebook computers, etc. Applicable models: full helmet, half helmet, uncovered helmet, etc. Colour: Black Material: ABS