AVINIA Smart Digital Timer Black

AVINIA Smart Digital Timer Quick easy to adjust a time only by twisting outer ring, and one touch button to just start/stop time countdown countup, designed for kitchen, classroom, fitness, meeting and more, whether we are elderly or kids, we can easily control and use it. Material: Resin knob +ABS Voltage: 4.5V Size: Diameter 3 inch x 1 inch Two brightness choices: High Brightness / Normal Timing range: 0-99 mins 55 secs Power batteries: 3 AAA 1.5V batteries included Volume gears: 1) Mute 0db 2) Normal 60-70db 3) Loud gear 80-90db