If you currently own this device, here are its primary features and common user feedback:
Sensor is still in warm-up phase or ambient temperature is too low. jkd-512com user manual
Clean the exterior casing once a month. Use a soft brush attachment on a vacuum cleaner to remove dust, cobwebs, and debris from the sensing vents. Never use liquid cleaners or water on the device. 6. Troubleshooting and Error Codes Symptom / Code Potential Cause Recommended Action LCD shows Lb + Single Chirp Low battery voltage. Replace both AA batteries immediately. LCD shows Err + Single Chirp Sensor malfunction or end of life. If you currently own this device, here are