The 90-minute TWIST® is an easy-to-use and fun time management tool great for kids and adults. To use, turn the outer ring until you reach your desired time (the TWIST® counts from 1 second to 60 seconds, then 1 minute to 90 minutes), then push the play button. A digital display shows at a glance how much time remains. Visual flashing alert with optional volume control (low/high/off). 1 AAA battery required for operation (not included). Can display on desktop using the integrated kickstand, or the magnetic back makes the TWIST® a snap to display. Easily attaches to metallic surfaces for ease of use and versatile placement options.