I used this once after purchasing it, but I am selling it because I bought another rangefinder. The condition is clean, but it is a used item, so please understand this. The following is an excerpt from the manufacturer: Item | Specification ---|--- Dimensions | 95.7 x 33.6 x 61.3mm Weight | 136g Power Source | Lithium polymer battery Charging Time | 2 hours Full charge: Approximately 25,000 measurements when measuring points Measurement Range | 5-1,000 Yds (5-913m) Error Range | 1m (straight-line distance) Magnification | 6x Laser Standard | IEC 60825-1 Class 1M Laser Product Lens Diameter | 20mm Operating Temperature | -10~50° C Storage Temperature | -20~60° C Waterproof | Equivalent to IPX4 (splashproof) Laser rangefinders are very simple products that measure distance by looking through the viewfinder. However, the hand shake during operation has been a long-standing issue because it requires button operation while looking at a target hundreds of yards away. There are ways to improve operability by incorporating a hand shake correction function, but this model was developed based on the idea that it would be better if you didn't have to press a button in the first place. In this context, we focused on the "voice recognition function" used in smartphones and other handheld devices. In addition, we adopted "red OLED" to improve visibility in the environment of golf courses, which have a lot of green and trees.