The model you see is a laser meter for measuring distance. The model is 100m. The accuracy is +/- 2 mm at 100 meters. It has two lights. It emits both red and green light. It can measure volume and area. It has a Pythagorean function. It is Class 2. It is harmless to the eyes. The wavelength is between 650 nanometers and 592 nanometers. It has all functions. It is new, high-quality, and factory-made. Other varieties are also available: cheap and expensive. Delivery service to regions and within the city is available. Contact us for your orders. Tel: 051/996-96-60.