The NRF24L01+ Module is an excellent wireless communication option between devices like the Arduino.

2.4 GHz 3dBi foldable antenna with reverse bias - SMA RF connector. Perfect for prototyping with RF ICs and Xbee modules. 50 ohm impedance. 10.16cm in length.

2.4GHz SMA - 3dBi antenna

3dBi GPS antenna SMA connector

Remote Control Compatible Garage 4 Channels Rolling Code (Water Resistant)

Replace all your Command Confusion with the Broadlink RM Mini 3 Universal Smart Home Wifi IR Remote Control with App and Professional Support, Compatible with Scene and Suspend Mode, Exceptional Hardware Configuration and Time function.

XBee 6.3mW Wire Antenna - Series 2C ZigBee Mesh