Technical Specifications Measurement Range: 0°–220° Angle Measurement Accuracy: ±0.1° Vial Accuracy: ±0.05° Angle Calculation Accuracy: ±0.1° Arm Length: 40 cm Power Supply: 4 × 1.5 V AA batteries Battery Runtime: Approx. 80 hours Automatic Shut-Off: Approx. 30 minutes Weight: Approx. 1.3 kg Digital Display: Yes Mechanical Locking Screw: Yes Description Angle Measurer Bosch GAM 220 Professional is a precise digital angle measuring tool designed for fast angle measurement, calculation and transfer. Its 0°–220° measuring range and ±0.1° accuracy make it suitable for accurately measuring corners and transferring angles onto workpieces. The mechanical locking screw allows the measured angle to be securely held during transfer. Ideal for: Carpentry, woodworking, construction, interior fitting, flooring, roof and stair construction, mitre angle measurement and mitre saw setup.