433Mhz SMA antenna. For use on the emonTx V3 and emonPi. 

Technical 

• 1/4 Wave Monopole Antenna 

• 90 Degree / Vertical Opperation

• Omni-Directional 

• VSWR <2.0

• SMA Male Connector

• 50ohm Impedance 

• 0dBi Gain 

• ABS / Rubber Housing

• Operates from -30 to+600C 

• Insulation resistance 500MΩ @500Vdc

Documentation 

emonTx V3.2 Technical Wiki

emnTx V3.4 Technical Wiki

Antenna Datasheet