Threestage timed shutdown Automatic timed shutdown with three options: 30, 60, or 120 minutes. Easy to set and helps you sleep peacefully without worrying about turning it off. Bluetooth 5.0 mode Uses a quality Bluetooth 5.0 chip for faster and more stable wireless connections, lower latency, and reduced power consumption, delivering clearer sound. 3D surround sound Designed to be placed under the pillow, delivering realistic 3D stereo sound that makes listening feel immersive and natural. Powerful 8hour battery life 400 mAh rechargeable lithium polymer battery provides long listening sessions, with fast charging for quick reuse. Compatibility and usage Compatible with Bluetoothenabled devices such as smartphones, tablets, and laptops; optimized for private listening without external speakers. Use scenarios Nighttime sleep aids: pair with your phone to play ambient sounds or guided sleep content, with automatic shutoff to avoid disturbances. Private relaxation: enjoy music, meditation, or storytelling while resting, using pillowbased audio without headphones. Travel or hotel use: compact, comfortable option for audio without disturbing others in shared spaces.