Modes: 10 sounds to help you drift off - white noise, lullaby 1, crickets, ocean waves, clocks, birds, heartbeat, lullaby 2, running water, and lullaby 3. Function: Be lulled to sleep with this white noise sleepbox! Colour: White. Power: 1W power with a charging time of one hour and working time of 23 hours. Sleepbox: Get a portable white noise machine. Size: 93 x 80 x 28mm - small enough to take with you anywhere! Portable White Noise Machine | Living Social