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 (Built-in) Music Play Time: About 20 hours Standby Time: About 300 hours Charging Voltage: 5V, 400mA Charging Time: About 2 hours Size (LxWxH): Approx. 15.5x3.6x1.2cm/6.10x1.41x0.47 inch Channel: 2 Audio Crossover: Full-range Input Power: 25W Rated Power: 4W Impedance: 2Ω Sensitivity: 32dB Total Harmonic Distortion: 1% Note: Color distortions may occur due to different computer resolutions. Slight measurement errors may occur due to manual measurement. Package Includes: 1 Speaker (with 1 Charging Cable, 1 User Manual)