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Technikkram 433MHz Antenna SMA for Arduino Raspberry Pi NFC GSM ISM CUL USB CC1101 GSM ESP8266 NodeMCU for Transmitter and Receiver External Spiral Antenna: Amazon.de: Computer & Accessories
Amazon.com: POBADY 433 MHz Antenna 3dBi SMA Male Adapter 3M RG174 Cable Magnetic Base Omni-Direction for Raspberry Pi NFC GSM ISM CUL USB CCU3 CCU2 CC1101 : Everything Else