1. Power supply voltage: 4.5V2. Power supply: three AA batteries (not included)3. Energy saving and environmental protection, automatic shutdown after three minutes of no operation4. 0-9 wood density gear selection, measure against wood density5. High-frequency electromagnetic wave induction probe, no need for probes, can quickly and accurately measure data6. The upper limit value will beep and alarm7. High-definition backlight display, easy to read the value under strong light at night8. Dimensions: 150x54x27mm9. Weight: about 275 gramsSpecification: Package Weight One Package Weight 0.30kgs / 0.67lb One Package Size 18cm * 8cm * 5cm / 7.09inch * 3.15inch * 1.97inch Qty per Carton 98 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 98 pcs = 17346 pcs40HQ: 412 cartons * 98 pcs = 40376 pcs