Advanced Bone Conduction Technology: Experience clear, immersive sound without ear fatigue as the pillow speaker utilizes bone conduction vibrations. This innovative approach ensures that even your family 't be as you indulge in your personal soundscape. Designed for Restful Sleep: Specifically crafted as a sleep-inducing aid, this pillow speaker leverages soothing music to promote quicker sleep and sleep cycles. It's perfect for everyone from adults to soothing babies, enhancing sleep quality for better health. Versatile Playback Options: Effortlessly switch between the built-in 32GB TF card for standalone play and Bluetooth for wireless streaming , with more than 200 songs. Extended Playtime: Equipped with a 400mAh battery, enjoy up to 15 hours of continuous audio playback. The pillow speaker offers a lengthy standby time of up to 150 days and features customizable sleep for a personalized musical sleep therapy. User-Friendly Design with Bluetooth 5.3: Stream your favorite audio effortlessly within a 10-meter range using the latest Bluetooth technology. The pillow speaker showcases a LED power display for easy monitoring of battery life and supports simple USB-C charging for user convenience. Built-in 2 bone conduction speakers, bone conduction speakers are also called bone conduction vibrators. They resonate and sound. You can feel a slight vibration when you hold them in your hand. Two sound effect modes, listening to songs mode and listening to books mode. The listening mode is a heavy bass stereo sound effect, and the listening mode is the sound, suitable for listening to books, novels, children listening to picture books, listening to stories, etc. Colour:A: Blue and purple two-color gradient Material:Aluminum alloy shell Package Contents: 1 x Bluetooth Pillow Speaker 1 x USB 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.