Features: High accuracy 0.05, high resolution 0.01. - battery rechargeable, durable. High resolution, professional measurement. Single and dual axis, convenient to measure the . Dual and single axis with friendly LCD display . V shape case for easy to fit at the or pipe. With 5 Side Magnetic base, audible alarming at settable range, any measurement. The unit could be by connecting the USB cable to the unit and a computer's USB port. Specifications: Accuracy: 0 to 20: (0.05) 20 to 70: (0.1) 70 to 90: (0.05) Measuring Range Single Axis: 360 , Dual Axis: 40 Resolution: 0.01 Response Time: Less than 0.4 second Offset Per C: 0.0058(typical) Operating Temperature: 0 to 50C (32 to 122 Fahrenheit) Storage Temperature: -10 to 60C (14 to 140 Fahrenheit) Interface: -color LCD with backlight Supply Power: Rechargeable -Polymer 3.7V Charger Port: 5V 500mA Mini type-B USB port Power Consumption: tandby: 10uA, Operation: 20mA Standby Battery Life: 4000 hours Operating Battery Life: 40 hours Magnetic Base: Set on 4 corners Magnetic Force: N48 Plug Type:US Plug,it applies to Canada, ,Mexico, Thailand, the , the Philippines,Taiwan and so on. Voltage: AC100-240V Material: Plastic colour: As shown Package Contents: 1 x Digital Protractor 1 x AC Adapter Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.