Review on 🔒 Enhanced HiLetgo 433M Transmitter + Receiver Kit: High-Frequency Super Regenerative Transceiver Module for Advanced Burglar Alarm Systems by Derrick Bellando

All transmitters were missing an inductor and all receivers were missing an inductor. None of the receivers have the variable inductor coated with epoxy, indicating that the elements have not been tested or tuned. Do not buy these items. Buy something other than these model numbers. I would not recommend buying the same model from any other retailer as they likely have the same issue. You can do image comparison with this product (don't buy them either!) https://www.amazon.com /gp/product/B019SX6Y22/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 This manufacturer sells unchecked incomplete parts as shown in pictures product. You can also google the circuit board schematic to see how it affects the functionality of the circuit. I found the best modules on Digikey and they came in an ESD package too.