Key benefits Improves VR immersion with stereo external amplification for clearer, richer sound. Builtin 300mAh battery enables wireless use during VR sessions without constant power. Simple operation with a single power button; clear status indicators keep you informed. Complete package includes essential accessories for immediate use. What you get 1 x VR Stereo External Amplifier 1 x Charging Cable How to use Press the power button to turn on the device. When charging, the red light is on; when fully charged, the green light indicates full charge. Builtin battery supports use without a constant external power supply. Specifications and features Builtin 300mAh battery for portable operation Charging status indicated by red (charging) and green (charged) Use scenarios VR gaming: enhances ingame audio for a more immersive experience. VR videos and virtual tours: provides richer stereo sound for a cinemalike feel. Onthego VR practice or longer sessions: rechargeable battery enables portable use without tethering to an adapter.