1.Activate The Phone Voice Assistant 2. Dual Intelligent Noise Reduction 3. The Innovative Audio Solutions Help Keep Your Conversations Free From Distractions Like Background Noise Or Wind 4. Suitable for helmets of various shapes 5.IP67 Waterproof, Don't Be Afraid Of Rain. Travel With Confidence Description: 1.Bluetooth Version:5.0 2. Frequency Range: .402GHz-2.480GHz 3. Transmission Distance: 10-15 Meters (Depending On The Device) 4. Microphone Transmission Distance: Less than 1 Meter 5. Lithium Battery: 3.7V/500mA 6.Continuous Working Time:Less than 15 Hours 7. Charging Voltage: 5V 8. Charging Time: Less than 4 Hours 9. Standby Time: Less than 240 Hours 10. Bluetooth Name: BT12 (High-End Speaker Core Is A Metal Bracket) Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use Colour:As Shown Material:ABS+Metal Package Contents: 1x Helmet Bluetooth Headset 1x USB Cable 1x Fixing Tool 4x Felted Adhesive Earphone Pads 2x Screws 1x Microphone Protector 1x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.