The high-precision laser measurement of the Smart Laser Measure offers ±3mm of accuracy, giving you a real-time measurement that is accurate and stable. Its single-button design is easy to use, simply hold the button down for 2 seconds to power on/off, hit to start/end the measurement, or double-click to switch to front/rear-based mode. The high brightness LCD display shows you the current and historical measurement with ease, as well as the test mode, unit, battery, and Bluetooth connection status. Using the 370mAh high-capacity lithium battery, the device can measure 3000 times on a single charge for extended use. The Type-C interface makes it convenient for recharging the laser measure quickly and easily. You can also easily control the device remotely via the App, allowing you access to data recording, calculation and scene guidance, or simply measure after taking photos in the App as well. FEATURES: High Measurement Accuracy High Brightness LCD Display 370mAh Lithium Battery Smart Connection to App Easy to Use SPECIFICATIONS: Measurement Range: 0.05-40 m Charging Time: Approx. 100 min Measurement Accuracy: ± (3 mm + 5 × 10-5D) Automatic Turn-off Time: 180 s Minimum Displaying Unit: 0.001 m Automatic Laser Off Time: 180 s Measurement Unit: m/ft Operating Temperature: -10℃to 50℃ Laser Type: 630-680 nm wavelength Storage Temperature -20℃to 60℃ Lithium-ion Battery: 3.7V 370mAh Storage Humidity: 20%-80% RH Display Screen: 1.23-inch LCD screen Bluetooth Transmission Distance: Approx. 8 m (without obstacles) Frequency Range: 2400-2483.5 MHz Bluetooth Power: 8 dBm Charging Input: 5 V 1A Accuracy: Class 2 Operating Power: 0.7 W (Max.) Colour: Black Product Dimensions: 8×3.5×2.1 cm Product Weight: Approx. 60 g Manufacturer Warranty: 12 Months