HiLetgo 5pcs 5V Heartbeat Detect Sensor Heart Rate Detect Measuring Module Measure Finger

Original price was: $129.00.Current price is: $6.49.
Price: (as of – Details) Description: Finger heartbeat measurement module arduino test code: INT led Pin=13; INT sensor Pin=0; Double

HiLetgo 5pcs Sound Sensor Module Voice Detect Voice Control Switch

$7.19
Price: (as of – Details) Sound Sensor Module Voice Detect Voice Control Switch Features: 1. It”s to be used for