Mileseey New X5 Laser Rangefinder Digital Laser Distance Meter laser roulette range finder tape distance measurer Model 1: X6(it is a Basic version, doesn't support charging, and does not come with a USB cable) Model 1 X6 Measuring accuracy 2mm Measuring units m/in/ft /ft+in Laser cla Cla 2 Laser type 630-670nm,<1mW Area, Volume Measurement Yes Pythagorean Yes Secondary Pythagorean Yes Automatic level Yes Automatic vertical Yes Angle sensor Yes Angle measurement accuracy 0.3+0.1+0.01*D Measurement benchmark Before/after benchmark Addition and subtraction Yes Continuous measurement Yes Single distance measurement Yes Beeper Yes Battery type: AAA 1.5v batteryBattery Not Included ) Historical memory 20 groups Model 2: M120- Mini Laser Tape Measure Note: Only the M120 bluetooth version has Bluetooth, can connect APP. Model 3: Mileseey X5 - Handheld Laser Distance Meter Model Mileseey X5 Measuring accuracy: 2mm Measuring units: m/in/ft /ft+in Laser cla: Cla 2 Laser type: 635nm,<1mW Area, Volume Measurement: Ye Secondary Pythagorean: Ye Indirect Pythagorean theorem: Ye Addition and subtraction: Ye Continuous measurement: Ye Min./max./value: Ye Beeper: Ye 4-line display with backlight: Ye Single distance measurement: Ye Historical memory: 20 Button: Soft rubber button Operating temperature: 0-40 degree Storage temperature: -10-60 degree Battery type: AAA 2 X 1.5VBattery Not Included ) Auto laser off: 30 second Auto instrument off: 180 second