Bluetooth Pillow Speaker, 20-Hour Playback, Slip Under Pillow for Relaxing Sleep

Application: This under pillow speaker is designed to accompany you during sleep, automatically turning off after 30 minutes to promote uninterrupted rest. Safe to Use: Equipped with a built-in polymer battery and dual MOS battery protection circuit, ensuring safety during rechargeable use. Comfortable to Use: With its small and thin bar appearance, this under pillow speaker ensures comfort while sleeping, without causing discomfort. Advanced Technology: Utilizes bone conduction technology to deliver clear sound without disturbing others, providing an immersive listening experience. Easy to Use: Features Bluetooth-compatible 5.0 functionality for seamless connection to your phone, allowing you to play soothing music effortlessly. Specification: Bluetooth-compatible Version: 5.0 Connection Range: Approx. 10m/32.81ft Material: Plastic Working Voltage: 3.7-4.2V Vocalism Unit: Bone conduction Frequency Response Range: 40Hz-20KHz S/R Rate: ≥75dB Battery: Polymer battery, 400mAh (