bluetooth Intercom Earphone For Motorcycle Helmet Riding Headphone Handsfree Music

Description: 1. One button to set up the caller to answer automatically, to satisfy different environment of customers. 2. bluetooth version upgrade to bluetooth 4.2, customer use better. 3. Product packaging volume and weight smaller and convenient transportation 4. Product price optimization compared with other styles has higher cost performance and stronger market competitiveness. Specification: Working voltage: DC5V bluetooth version: V4.2+BR+EDR Support bluetooth Protocol: Suppore a2dp/avctp/avdtp/avrcp/hfp/spp/smp/att/gap/gatt/rfcomm/sdp/L2cap profile Effective distance: 10-15 meters / barrier free 30 meters Frequency: 2.402 GHz to 2.480GHz Distortion: -70db Data transmission rate: 300Kb/S Audio coding specification: SBC Transmission power: 4dbm Signal to noise ratio: >90db Sensitivity: -85db bluetooth connection time: 5-7S Charge time: less than 1 hours. Standby time: less than 160 hours. Continuous working time: less than 8 hours Package Included: 1 X Motorcycle Helmet Earphone