[Can be Paired with Q7 Intercom]: E1+ helmet speaker can be used as a intercom and connected with Q7 intercom, and they will be automatically paired when entering the pairing mode. The talking distance range is between 10-20m. It is suitable for couples or partners sitting in the front and rear seats of a motorcycle. [Connect 2 Mobile Phones]: E1+ bluetooth helmet speaker can connect 2 mobile phones via bluetooth and support auto-receiving calls, play/switch music, adjust volume and voice assistant function. The connection distance with mobile phone can reach 10 meters. [360mAh Battery Capacity]: E1+ left and right speaker each have a built-in 360mAh rechargeable battery. When charging, the red light is on, and when it is full, the red light is off. The charging time is about 2.5h, the call/music playing time is up to 19h and the standby time can reach 200h, which is a good choice for long-time riding enthusiasts. [CVC Noise Reduction Technology]: E1+ motorcycle helmet speaker adopts advanced CVC noise reduction technology to eliminate the echo and ambient noise of the call, so that the sound you hear is more clear and stable, with 3D stereo sound effect. [Qualcomm Bluetooth 5.1]: Applying optimized Qualcomm Bluetooth 5.1 chip, E1+ helmet Bluetooth headset has faster data transmission speed and longer connection distance. The communication experience becomes more stable and reliable.