Fall asleep faster mask distracting noise on the go! 6 sound options a sleep timer in a super compact size. Features 6 Sounds: White Noise, Brown Noise, Nature Sounds, Lullaby Play continuously or set the sleep timer to 30m, 1hr or 2hr Adjustable Volume USB-Rechargeable - lasts a minimum 8 hours on a full charge Includes Removeable Lanyard 1-year limited warranty Feature Details Brand Yogasleep Mfg part # 4001240 Warranty 1-Year Warranty Color Grey / Silver Item Dimensions 3.5" x 3.5" x 1.8" Weight (lbs) 0.6 Battery operated? Yes (batteries required) Batteries included? Yes Battery details Rechargeable Lithium-ion What's included? (1) Travelcube, (1) Removeable Lanyard Country of Manufacture China Alarm Clock No Radio No Bluetooth No Smartphone Compatibility iOS Android No No Sound Source Speaker Run Time(s) Continuous 30 min 60 min 90 min Yes Yes Yes No