Ultra Portable and Cordless Design: Enjoy better sleep anywhere with the white noise machine ultra-portable and cordless design. It's small and lightweight, making it a perfect travel noise machine. With a lanyard, you can easily hang it on your pram, car seat, or suitcase. Take it with you on walks, hotel stays, or business trips to enjoy portable freedomUnparalleled Quality and Guarantee: Backed by a one-year limited warranty and an unwavering commitment to exceptional customer service, we stand behind every product and offer a 30-day return policy. If you have any questions or concerns about the product or our service, please don't hesitate to contact us, and we will strive to resolve them promptlyLong Battery Life & Environmental Protection: This white noise machine features a built-in 1200mAh rechargeable battery, providing a remarkable 52-hour runtime on a single charge. Equipped with a Type-C charging cable, it eliminates the need for battery replacement and supports rechargeable and recyclable use, enhancing energy efficiency and environmental friendliness, ensuring convenient usage at any timeMemory Function & Timer Shutdown: This portable white noise machine features a memory function that retains the sounds and volume settings from your previous use, eliminating the need for readjustment each time you use it, which is convenient. It offers continuous play or 30, 60, 90-minute, and 8-hour auto shut-off timer options, allowing you to set the timer on your audio equipment for more efficient use and power saving21 High Quality Sounds: This white noise machine for babies features a total of 21 sleep sounds, including white noise, natural sounds (stream, waves, thunder, rain, etc.), and children's sounds (Shushing, Fetal Heartbeats, heartbeat, twinkle twinkle little star, lullabies, and other sounds). It is suitable for bedtime sleep music, baby sleep music, yoga meditation music, and various relaxation needs