1. Pulse, demagnetization, measuring battery, measuring error, etc. 2. Made of circuit board and plastic material, sturdy and durable 3. Lightweight and compact, very convenient to carry and store 4. Can be used to test the quartz movement of the watch, with high operating efficiency 5. Includes an additional daily error measurement function, which enhances its practicality and versatility 6. Material: circuit board + plastic 7. Use 2 1.5V ordinary batteries (not included) 8. Size: 10.8 x 8 x 3.1cm
