aqxreight Helmet Headphone,1 Pair Motorcycle Helmet BT Headset Headphone Speakers Support Handsfree Calling Excellent performance: Helmet headphone is manufactured by professional factory with fine workmanship and undergoes strict quality inspection and factory testing for excellent performance and reliability. BT V4.1 + EDR provides more stable and smooth connection. Premium material: made of high quality ABS material,, impact resistant, not easy to damage, lightweight and wear resistant. Good weather resistance, no rust, not easy to aging, long service life. Suitable for: Brand new high quality motorcycle helmet headset, fit for road cycling, outdoor touring, etc. Please make sure the product is suitable before you place an order. Specification: Condition: 100% Brand New BT Version: 4.1 + EDR, CSR Frequency: 2.402GHz-2.480GHZ Transmission Range: 15-20 meters / 49.2-65.6ft(Depending on the equipment) Microphone Transmission Distance: ≤1m Li-ion Battery: 3.7V/500mA Playback Time: ≤15 hours Charging Voltage: 5V Charging Time: ≤3 hour Delay: ≤ 240 hours BT Name: BT12 Color: Black Weight: Approx. 180g / 6.3 oz Package list: 1 * Helmet BT Headset 1 * Charging Cable 1 * User Manual