Yogasleep 4001240 Travelcube Portable Sound Machine

The Travel Cube has a battery life on a full charge of approximately 8 hours. It has the option to be set to run on a 30 min, 1 hr, or 2 hr timer, or to operate until the battery dies or it is manually shut off! This means you could potentially have your machine on and operating for approximately 8 hours.

It is a white noise not a fan sound. It also has waves and waterfall. Along with volume control. The battery life lastes 50-60 hours.

No, the GO does not have any lights. It does have an indicator light that blinks while charging and when the battery is low. When the unit is first powered on it will stay on for a minute and then turns off. There are not any other lights on the unit.

There is no way to change out the battery. Fully charged will last up to 50 hours. If you need more you could use a portable battery charger as this item has a usb cord.