1. Sleep machine for soothing babies and supporting sleep - Designed to calm little ones and assist sleep when familiar voices are not nearby. White noise provides a comforting environment similar to the sounds babies know from the womb. 2. 10 non-looping sounds - White Noise, Clock, Cricket, Sea waves, Streams, Heartbeat, Birds, Lullaby 1, Lullaby 2, Lullaby 3 3. 3 timers and memory function - Play continuously or auto shut down after 15, 30, or 60 minutes. - The device remembers your last sound selection, light color, brightness, and volume so you do not need to reselect each time. 4. Auto and smart white noise machine - Automatic noise detection button: enter detection mode by pressing and holding for 2 seconds. - The white indicator light stays on. - If continuous noise is detected for 10 seconds, playback starts automatically; stops after 15 minutes and re-enters detection mode for looping. - Long press 2 seconds to close the detection mode; detection distance is 6-10 meters. 5. Pocket white noise machine - Size: 3.66 x 3.15 x 1.12 inches. - Pocket-sized and travel-friendly, easy to carry anywhere. 6. Sleep sound machine benefits and performance - Helps ease the mind and promote quicker sleep for adults, relieving fatigue. - Supports sleep and development for children and adolescents, and can aid elderly sleep and physical well-being. - When a single frequency noise appears together with white noise, the single frequency is mixed into the white noise and remains inaudible to the human ear, reducing disturbance.