SW-T40 Specifications: Brand:SNDWAY Model No:SW-T40 Working range:40m Accuracy: 2 mm Unit options:m/in/ft Continuous measurement function:Yes Area measurement function:Yes Volume measurement function:Yes Pythagorean proposition measurement function:Full mode Add and subtract measurement function:Yes Min/Max value:Yes Max storage:30 units Backlight:Yes Button/key:Yes Laser level: Class II Laser type: 635nm, <1mW Auto cut off laser: 20s Auto shut down:150s Storage temperature: -20-60 Working temperature: 0-40 Storage humidity: 20%-80%RH Battery: 1.5V 2 x AAA (not included ) Dimension: 112 x 50x 25mm Weight:90g Package Information: Package size: 16 * 8.6 * 5cm / 6.3 * 3.4 * 2in Package weight: 171g / 6.04 oz Gift box package Package List: 1 x Laser Distance Meter 1 x Portable pouch 1 x Hanging rope 1 x Reflective plate 1 x User manual SW-T60 Specifications: Brand:SNDWAY Model No:SW-T60 Working range:60m Accuracy: 2 mm Unit options:m/in/ft Continuous measurement function:Yes Area measurement function:Yes Volume measurement function:Yes Pythagorean proposition measurement function:Full mode Add and subtract measurement function:Yes Min/Max value:Yes Max storage:30 units Backlight:Yes Button/key:Yes Laser level: Class II Laser type: 635nm, <1mW Auto cut off laser: 20s Auto shut down:150s Storage temperature: -20-60 Working temperature: 0-40 Storage humidity: 20%-80%RH Battery: 1.5V 2 x AAA (not included ) Dimension: 112 x 50x 25mm Weight:90g Package Information: Package size: 16 * 8.6 * 5cm / 6.3 * 3.