Ultra-thin discreet design: Designed for sleeping comfort, this invisible under-pillow speaker is only 1.2 cm thick. The flat construction is wrapped in soft polyester fiber and ABS material and can be completely hidden under the mattress to provide a natural and undisturbed sleep experience. Seamless Bluetooth 5.4 Connection: This under-pillow Bluetooth speaker uses Bluetooth 5.4 technology and provides a stable and reliable wireless connection. Personal sound in shared room: Choose soothing white noise (ocean waves, forest streams, birdsong) or your own playlist to create the perfect sleeping environment. Enjoy your favorite sleep playlists, audiobooks or relaxing sounds without interruption. Extra long battery life and timer function: The wireless under-pillow speaker can play for up to 20 hours on a single charge and lasts for multiple nights. Built-in 30/60/90 minute auto-off timer helps you fall asleep naturally while saving battery. Compact and portable - the perfect sleeping companion at home and on the go: Small and lightweight, it can easily be packed into a travel bag or backpack. Whether you're at home, in a dorm room or on a business trip, this flat pillow speaker is an ideal travel companion.