BT-S2NS Motocycle Bluetooth-Compatible Helmet Headset Intecom Watepoof Multi Intephone FM MP3 1000M

2 types of earphones & microphones for your choice: Comparison of old and new interfaces: Please note: If you want to communicate with others, please purchase 2 or 3 units.(It can support a maximum of 3 intercom units) Technical Specifications: Version: 5.0+EDR Frequency: 2.4GHz Supports: A2DP and AVRCP Supported Profiles: Headset and Hands-Free Profiles with Automatic Detection Operating Range: Up to 10m for cellphones Battery Type: Rechargeable Lithium Polymer 450mAh Standby: Up to 300 hours Talk time: Phone up to 10 hours, Intercom up to 8 hours Charging Time: 3 hours Power Adapter: DC5V 500mA Features description: Can be realized helmet headset with helmet headset 800 meters (or 800-1000 meters) of direct full-duplex intercom; can be achieved with Bluetooth-compatible and cellular phones, intercom calls, stereo music, and automatic switching between them; recovery intercom; FM Radio function can be reached by telephone, refuses to answer the phone and hangs up; support for voice switching; through the transmission over A2DP to enjoy music through mobile phones or connected GPS; can be controlled via mobile phone music AVRCP play, pause, previous song, next song played; There are rumors of DSP noise reduction and processing, high-speed exercise to ensure clear call quality. To pair 2 devices in intercom mode: When both devices are turned off, press and hold the power/intercom button on both devices until both units flash red/blue repeatedly.You need to hold the button for more than 6 seconds and don't let go when you see the blue light. Briefly press the power/intercom button on ONE of the two devices and this device will search and auto-pair to the other in intercom mode. A live call will be initiated. (Intercom will start) If this fails, try again ensuring both red/blue light sequences are initiated simultaneously and are close together.Also Ensure any other Bluetooth-compatible devices are turned off. When paired, you do not need to go into pairing mode again.In the future, you only need to enter standby mode (blue light flashing) on both units and press the button on one of the devices. To pair 3 devices in intercom mode: