Feature
1. Battery status indicator
2. Low power inspection of the battery
3. Built-in speaker
4. The probe can be changeable
5. Probe inspection
6. Auto shut off
7. Can adjust the volume level

Specification
1. Product Name: RZ-100S9
2. Safety: in accordance with IEC60601-1: EC60601-2, EC60601-3.
3. FHR measurement range: 50~240BPM (beats per minute)
4. Resolution: 1 BPM
5. Accuracy: +/- 1BPM
6. Power: 2 AA batteries (not included)
7. Size: 130x100x36mm
8. Weight: about 250g
9. Working temperature: 5~40 degree C
10. Working humidity: <80%
11. Storage temperature: -20~60 degree C
12. Storage humidity: <93%