1, Multi-function color LCD touch display only SW-1500B/1000B/800B 2, Automatic turn off 3, Quick measurement 4, Speed measurement 5, Area measurement only SW-1500B/1000B/800B 6, Volume measurement only SW-1500B/1000B/800B 7, Flagpole lock function 8, 750MAH Li-ion rechargeable battery 9, Automatic data store function 30 units only SW-1500B/1000B/800B Specifications for SW-600A, SW-1000A, SW-1500A 1.Model: SW-600A/SW-1000A/SW-1500A 2.Working Range: 600M/1000M/1500M 3.Measuring Accuracy:±(1.0m+D*0.2%) 4.Magnification:(6.0±5%)X 5.Measuring unit: meter,yard 6.Field of view:6°±10% 7.Speed Measurement:yes 8.Speed Measure Range:0~300 Km/h 9.Height Measurement:yes 10.Flagpole Locking: yes 11.Angle Range:±90° 12. Diopter Adjustable Range:±6° 13.Objective caliber:23.7mm 14.Eyepiece caliber:15.0mm 15.Battery:750mAh Li-ion Specifications for SW-800B, SW-1000B, SW-1500B 1.Model: SW-800B/SW-1000B/SW-1500B 2.Working Range: 800M/1000M/1500M 3.Speed Measure Range:0~300 Km/h 4.Distance Measure Accuracy:±(1.0m+D*0.2%) 5.Water Resistant:IP54 6. Height Measurement:YES 7. Scan Distance Measure: YES 8. Flagpole Lock: YES 9. Automatic Storage: 30units 10. Angle Range:±90° 11.Angle Tolerance: ±1° 12.Magnification:(6.0±5%)X 13. Objective Caliber:23.7mm 14. Eyepiece caliber: 15.0mm 15. Field of view:6.0°±10% 16. Diopter Adjustable Range:±6° 17. Measuring unit: meter,yard 18. Battery:750mAh Li-ion