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Sale!
$14.99$26.21

4 working modes can be switched at will: 1. Instant mode = fast mode: WKMD, 1,30 (real-time tracking when using the device, upload data every 30 seconds, upload frequency is 30 seconds-120 seconds) 2. Super power saving mode = roll call mode: WKMD,2,0 (when not using the device, use this mode. Upload data through APP [...]