The three background noise options and wide volume range let you find the best level for your child. Attach this portable Marpac Hushh white-noise sound machine to a stroller with the baby-safe clip to mask nap distractions away from home. Soothing sound Cradles your baby in consistent adjustable sound to promote restful sleep cycles. 3 sound options Promote sleep and mask noise with the help of bright white noise, deep white noise or gentle surf. Sound masking Masks everyday noises. Volume control Lets you adjust the sound level to suit your preferences. Portable design Ideal for travel. Child lock You can lock Hushh at a desired setting and volume to prevent children from altering the sound or turning the unit off. Amber LED night light Provides just enough light to see without waking up a parent or baby. Rechargeable lithium-ion battery For extended battery life. Convenient USB charging (USB cable included).