Features 1、The ruler is made of stainless steel material, practical and durable. 2、Designed with locking knob for locking angle at any convenient position. 3、Ruler and protractor 2 in 1 combination for easy measuring. 4、Quick and easy to read the measurement with LCD clearly display. 5、Digital calculation system makes angles and length measurements more quickly and accurately. Specification Features: The ruler is made of stainless steel material, practical and durable. Designed with locking knob for locking angle at any convenient position. Ruler and protractor 2 in 1 combination for easy measuring. Quick and easy to read the measurement with LCD clearly display. Digital calculation system makes angles and length measurements more quickly and accurately. Specification: Material: Stainless steel Measurement Range: 0-360°, 10-390mm Resolution: 0.05° Accuracy: ±0.3° IP Rating: IP54 Operating Temperature: 5℃~45℃ Operating Humidity: ≤85%RH Battery: 3V CR2032 Battery Weight: 228g / 8oz (approx.) Package list: 1 * Protractor Ruler Package List