Powerful 8hour battery life with a 400mAh rechargeable lithium polymer battery. Fast charging keeps you listening longer with less downtime. 3D surround sound. Place the unit under the pillow and enjoy a realistic 3D stereo listening experience that makes you feel as if you are there. Threestage timed shutdown. Automatic shutdown in 30/60/120 minute intervals. Easy to set for a peaceful sleep and energy conservation. Bluetooth 5.0 mode. Uses a quality Bluetooth chip for faster and more stable connections, low latency and low power consumption, and clearer sound. Key attributes Function: Sleep timer, immersive audio, wireless Bluetooth listening Compatibility: Bluetooth 5.0 enabled devices for wireless pairing Performance: 400mAh LiPo battery, up to 8 hours of use, fast charging, low latency, clear audio Applications Bedtime listening: Use for music, sleep aids, or guided meditations placed under the pillow for private, immersive audio that aids relaxation and sleep. Travel and lodging: Ideal for redeye flights, trains, or hotel rooms where quiet, private listening is preferred without disturbing others. Shared spaces: Dorms or apartments where discreet, listening is beneficial for nighttime audio sessions.