Muffle big city sounds, noisy neighbors, or even nagging thoughts with this small but impressive sound machine. It boasts eleven sound settings, including fans, white noise, and nature (we’re partial to ocean waves), and charges via USB so you don’t have to scramble for batteries or an outlet. Just hook it on any doorknob or bedpost, adjust the volume, and Zzzzz….

• ABS plastic, Lithium-ion rechargeable battery
• 4.25" x 2.2" x 1.375"