Feature: 1. Rich Sounds: This baby sound machine provides rich sounds for you to choose from, such as white noise, summer night, rain, serenade, lullaby, stream, wave, soft music, birdsong. 2. Aid Sleeping: This white noise sound machine provides comfortable sounds that can soothe your baby to sleep better. 3. Smart Timing: This noise machine supports timing function, including 15 minutes in red LED, 30 minutes in green light and 60 minutes in blue LED. 4. Easy Operation: This sleep machine with simple buttons can be easily operated, easy to switch the sounds and control the volume. 5. Space Saving: This white noise machine is portable and space saving, which can be easily put into your bag and case. Specification: Item Type: Baby Sound Machine Material: Plastic Battery Type: Lithium Battery 5V 800mAh (Battery Included) Usage Time: 50 Hours Charging Time: 1 Hour Product Size: Approx. 8 x 8 x 3.3cm / 3.1 x 3.1 x 1.3in ( Manual Measurement, Slight Error May Exist ). Package List: 1 x Baby Sound Machine1 x USB Cable1 x User Manual