Specification: Model:S1; Color:Yellow+ Black; Application:Land Surveying; Measurement function: Area, Distance; Satellite signals:GPS GLONASS SBAS BeiDou; Screen color: black and white; Battery:Lithium Battery+AAA battery(not included); Product size:117mm*61mm*22mm; Working temperature:20C~65C; Storage temperature: -40C~75C. Feature: HIGH PRECISION ACCURACY: Great support GPS, GLONASS Navigation Satellite System, Super strong signal, provide instant and precise positioning, With high-precision technology, area measurement error: 1-2% LARGE LCD: 2.4 inch 320 x 240 large screen that makes more clear and visually, you can set the local time for the area measure. MULTIPLE MEASUREMENT FEATURES: GPS area measuring tool of any shape (mountainous land, slope and flat field),and measure length of any shape straight line,curve;figure track and automatically calculate price measurement. DURABLE AND RESONABLE DESIGN: With strong waterproof and dust-proof function, can protect the area measure to the maximum extent; With portable design, fits in your hand or pockets perfectly; Rubberized case offers a comfortable feeling of grip. WIDE RANGE OF APPLICATIONS: Apply for land segmentation, harvesting, hillside measurement, exploration, farmland, lake surface measurement and so on.