Product details: Xiaomi Mijia Smart Laser Measure Digital Diastimeter Real-time Ranging Area/volume/length calculation High-precision Rangefinder Portable Handheld Infrared Measuring Instrument. 2.Features: - Real-time ranging, you can measure wherever you point. - ±3mm Measurement accuracy, handheld high-precision rangefinder. - Area/volume/length calculation, support Mijia App smart measurement. - One-button control with 1.23-inch LCD display, easy operation. - Auto shut down if no operation is performed on the product within 180 seconds. 3.Specification: Measuring range: 5 CM - 40 meters. Measurement accuracy: ±3mm Minimum display unit: 0.001m BT transmission distance: about 8m (obstacle-free) Charging port: Type-C Battery capacity: 370mAh Automatic power off after no operation for 3 mins Size: 80*35 *21 mm Weight: about 60 g Warranty: 1 year.