Product Description Function: Product material: aluminum alloy + ABS Product color: gray Product size: 5.6x2.2x1.3cm Color box size: 10.4x4.3x2.8cm Measurement accuracy: ±(2.0mm + 5x D) Range: 0.03 ~ 25 meters Measurement reference: front / rear reference Measurement unit: m / ft / in Laser type: Class2, 630 ~ 670nm, 1mW Working temperature: 0 ℃ ~ 40 ℃ Battery type: polymer lithium battery 3.7V 250mAh (built-in lithium battery shipped) Charging interface: Micro USB Number of buttons: 3 Function description: continuous measurement, area, volume, Pythagorean measurement Electronic angle: optional Selling point: 1. High-precision one-piece molding process, polishing and sandblasting, comfortable hand feeling. 2. Powerful, you can test words, you can test multiple times, and you can test angles. 3. Small and light, with a weight of 24g, there is no burden on the hand.