Shell material: aluminum alloy + silicone Shell process: fine polishing + matte sandblasting Screen: 1.8-inch VA LCD screen (white characters on black background) Screen cover: 4H ultra-hard plexiglass Size: 53*15mm (diameter + thickness) Net weight: 35g Single distance measurement: up to 9.99 meters Cumulative ranging: up to 99.99 meters Accuracy: 0.5%, support stepless adjustment Backlight time: 30-180 seconds Buzzer: On/Off Battery: 200mAh 0.74wh Charging port: Type-C Electronic ruler arc black technology equipment 8 functions I ultra-thin portable high-definition LCD screen I super long battery life Black technology equipment life and work all-rounder Combining up to 10 practical functions such as straight line measurement, arc measurement, arbitrary curve measurement, irregular surface measurement, cylinder diameter measurement, etc., 10 sets of accumulation/decrement history records. Measurement prompt sound, measurement volume breathing light, unit switching, etc.: Easily cover your various measurement needs. telemetry Practical single-time 0-99m distance measurement, ultra-long-distance measurement up to 99m (automatic accumulation), millimeter-level accuracy, automatic accumulation of measurement data, 10 sets of historical records can be called at any time, convenient and practical. Minimalist Seiko texture Lightweight and portable 15mm ultra-thin body, 30g light weight, which is 1/3 of the volume and 1/4 of the weight of a steel tape measure, convenient for you to carry and measure at any time. The life of core components is extended r100000 times Ultra-low power microprocessor for long standby and battery life. Imported TDK inductors, capacitors, low-inertia high-precision digital encoders are used to assist metal casings and high-precision nylon gears to assist high-precision CNC machining, with long service life. Battery direct charging 200 days long standby time Equipped with a 200mA low internal resistance polymer battery, it has a battery life of 3000 meters on a full charge and a super long standby time of 200 days. Type-C high compatible interface, charging for 5 minutes, battery life for 2 hours, giving you ultra-low cost of use. Changeable measurement application scenarios Flat, curved, irregular, circular diameter, soft objects can be measured, covering all aspects of your life and work. Make it easy to use, convenient and efficient.