Catalog > Consumer Electronics > Kits > Various Kits Pulse Heart Rate Module Pulse Heart Rate Module Pulse Heart Rate Module Part No: HKD HEART PULSE RATE MODULE 75.00 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Specifications Board diameter : 16mm Board thickness : 1.6mm (common PCB thickness) LED peak wavelength : 515nm Supply voltage : 3.3v or 5v Output signal type : analog signal Output signal size : 0~3.3v (3.3v power supply) or 0~5v (5v power supply) Current size : ~4ma (5V)