1、 Function Overview:
3.0V power supply, no display, one button, one indicator light, ST17H66 Bluetooth sends data to APP, only in circular measurement mode
2、 Detailed parameters:
1. Power supply: DC3.0V（1*CR2032）
2. Measurement range: 3-150cm
3. Resolution: 0.1cm
4. Joint dosage: 2cm
5. Unit setting: cm
6. Negative value: Measure negative values and immediately reset them to zero
7. Power on: After powering on, turn on the device. When the device is turned off, use a ruler to measure or press a button to turn it on. When the device is turned on, switch to Bluetooth mode
8. Key function: In the shutdown state, press once to turn on the device. After measuring, press once to upload data. Long press for three seconds to reset to zero
9. Indicator light: The power on status light flashes (once per second), stays on after connecting to Bluetooth, and flashes rapidly (four times per second) when sending data
10. Automatic shutdown: If there is no action for 30 seconds in a non connected state, it will automatically shut down; if there is no action for 120 seconds in a connected state, it will automatically shut down
11. Average working current: mA
12. Average standby current: uA
13. Low battery prompt: 2.4V power on light flashes for 2 seconds and shuts down
