Ohuhu Handheld Washing Machine Ultrasonic Laundry Stick Handy Washer for Removing Wine Coffee Stains Super portable mini washing machine, can be put into pocket or hand bag. Easily removes oil, ink, milk, wine, coffee and perspiration stains in 1 minute. [Works more effective with detergent.] One-touch rubber button switch, provides 700 beats/min. Can store 10 ml water in the beating bar to wet the stains. [Drivel by 3 AAA batteries] Great for a long trip and other occasions when you might need an immediate solution for removing stains anywhere on the go.