Package dimensions: 23x23x32cm. Variable control & grinding mode. Filter size: 110mmx 90mmx 9mm. UV & infrared protection: up to din 15 at all times. Power on & off automatically. Dark shade: din 9-13, light shade: din 4. Switching time: 1/25,000 s. Delay time: 0.2-0.5-0.8 s from dark to bright. Sensitivity: low-middle-high. Solar cells & lithium batteries.