1. Good phase optical linearity, accurate and stable2. Aspheric optical focusing lens, dual photoreceptor holes, physical bi-level bubble3. Aspherical optical lens, excellent low distortion and anti-interference performance, greatly reducing the impact of ambient light4. HD backlight, easy to use in dark environment5. Double horizontal bubble, clear observation of horizontal and vertical to improve measurement accuracy6. Anti-fall, one-piece molding, inner and outer rubber7. Protection class: IP548. Working voltage: 3v30 groups of data storage, can be consulted at any time, record without paper and pen9. Measurement mode: length / area / volume / Pythagorean / angle measurement / height measurement / wall speed measurement10. Waterproof and dustproof, 1.5 meters11. Measuring range: SW-G4S: 40 meters, SW-M50: 50 meters, SW-M70: 70 meters, SW-M80: 80 meters, SW-M100: 100 meters, SW-M120: 120 meters12. Scope of application: indoor ranging measurement, length/height measurement, infrared ranging13. Power supply mode: 2 AA batteries (not included in the product)14. Packing list: host, warranty card/certificate, manual, color box, cloth bag, reflector, lanyard15. Dimensions: 11.2 x 5 x 2.5cm16. Weight: 125gSpecification: Package Weight One Package Weight 0.30kgs / 0.67lb One Package Size 16.5cm * 11.5cm * 6.5cm / 6.5inch * 4.53inch * 2.56inch Qty per Carton 80 Carton Weight 18.00kgs / 39.68lb Carton Size 57cm * 37cm * 37cm / 22.44inch * 14.57inch * 14.57inch Loading Container 20GP: 341 cartons * 80 pcs = 27280 pcs40HQ: 793 cartons * 80 pcs = 63440 pcs