Features: Adopt high quality Bluetooth-compatible 5.4 chip, faster and more stable connection, low latency and low power consumption, clearer sound.Stress-reducing and sleep-aiding sounds White noise accompanies you to sleep. Different sound scenario to help you asleep peacefully and calmly. Transmit the sound not disturb others, watching short videos,will not disturb the person next to your pillow. Thin and lightweighted designing, flat shape, easy to put in your pocket, travel without burden. Timer shutdown at three different times, easy to set up, no need to get up at night to operate. Rechargeable 400mah battery, fast charging, 8h battery service Specifications: Product name: Bluetooth-compatible Bone Conduction Sound Box Product color: white/black/gray/fruit green/pink Charging voltages: 5V/200mA Operating voltages: 3.7/4.2V Battery capacity: 400mAh Bluetooth-compatible version: 5.4 Bluetooth-compatible distance:about 10m 3.3ft Charging Port: Type C Charging time: 2hours Playback time: 8hours Product weight: about 47.5g Product Size: about 15.5x3.50cm/6.1x1.38in Package Includes: 1PC Wireless Pillow Speaker note: Please allow 0-1cm error due to manual measurement. please make sure do not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual color.