MR apex locator is used for root canal shaping and cleaning equipment during root canal treatment, while root measurement is an auxiliary device for root canal treatment to measure apical length. Specifications: - Power supply: Lithium battery(3.7 V; 1500 mA/h). - Contra-angle: Model 2110CH ( micro, Friction fixed ), Transmission ratio 1:1. - Applied part: Contra-angle type BF. - Charing time: 3±0.5h. - LCD screen: 45 x 73 mm. - Dimensions: (124 x 75 x 30) ±3 mm. - Weight: 200 ±10 Gr. - Operating temperature: +10℃~+40℃. - Operating humidity: 30%~75%.