Review on Cool Mist Humidifier for Bedroom - Portable Mini Desktop USB Humidifier 400ml/14 Oz - Quiet Ultrasonic Humidifier with Night Light - Auto Shut Off Air Humidifier for Bedroom, Office, Car by Tammy Campbell

At first I couldn't find the USB cable (it's in the water tank). The instructions are pretty useless, but pretty easy to figure out (also watch their video for instructions, it's helpful). A light touch is enough to switch functions on or off. In the beginning I was too hard. I only ordered 1 until I saw if it worked well. I haven't measured how long it lasts, but for the size it's pretty good. I filled it up and turned it on before bed and it was still working when I got up in the morning. I need a few of these for rooms with higher houseplant humidity that my larger houseplants can't reach. I connected mine to the Mophie power bank. I will order more. I am a legal mom/grandmother from USA, Alabama whose other credentials you can check to verify.