Compact Design: This sleep speaker is designed to fit comfortably under your pillow, allowing you to enjoy your favorite audio without disturbing others Sound Quality and Bone Conduction: The sound quality is sufficient for white noise, meditation music, and audiobooks, leveraging bone conduction to deliver sound effectively when placed under a pillow Battery Life and Auto Shut-off: The speaker has a battery life that lasts max for 20 hours, with some users mentioning a built-in 30/60m auto shut-off feature that helps conserve battery power. Comfort and Ease of Use: Designed for comfort, the speaker's slight pressure against the pillow transfers vibrations to you, enabling you to "hear" the sound without disturbing your partner. Compact and Portable: The speaker is small and , easily fitting inside your pillow case for seamless integration into your sleep routine Color:Black Material:plastic Package Contents: 1 * SleepBao speaker 1 * charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.