1. Divided into 4 gears, ??1 gear: 0.0 - 199.9Lux, ??10 gears: 20.0*10 - 199.9*10Lux, ??100 gears: 20.0*100 - 199.9*100Lux, ??1000 gears: 20.0*1000 - 199.9* 1000Lux 2. Can be connected by Bluetooth, easy to use 3. USB computer analysis software, data automatic / manual storage 4. Backlight and data retention, automatic switch meter settings 5. Good quality and long service lifeSpecification: Package Weight One Package Weight 0.75kgs / 1.65lb One Package Size 24cm * 21cm * 6.4cm / 9.45inch * 8.27inch * 2.52inch Qty per Carton 10 Carton Weight 8.78kgs / 19.36lb Carton Size 28cm * 42cm * 32cm / 11.02inch * 16.54inch * 12.6inch Loading Container 20GP: 708 cartons * 10 pcs = 7080 pcs40HQ: 1645 cartons * 10 pcs = 16450 pcs