This simple spring antenna matches great with any of our 433MHz RFM and LoRa breakouts, bonnets and Feathers. They're made of copper-clad wire so you can solder them easily.They are compact, only ~38mm / 1.5" long, and have 2.5dBi of gain and 50Ω impedance, so it will work fantastically with just about any 400~450MHz wireless receiver/transmitter.Technical Details * Dimensions: 38.5mm x 5.5mm x 4mm * Datasheet https://elecena.pl/product/22718069/simple-spring-antenna-433mhz 2023-03-07 https://elecena.pl/product/22718069/simple-spring-antenna-433mhz 2023-12-27 https://elecena.pl/product/22718069/simple-spring-antenna-433mhz 2024-09-19 https://elecena.pl/product/22718069/simple-spring-antenna-433mhz 2024-11-29 https://elecena.pl/product/22718069/simple-spring-antenna-433mhz 2024-11-30 https://elecena.pl/product/22718069/simple-spring-antenna-433mhz 2025-04-10 https://elecena.pl/product/22718069/simple-spring-antenna-433mhz 2025-11-28 https://elecena.pl/product/22718069/simple-spring-antenna-433mhz 2025-11-29