The singularity 5.8 is True RC's most advanced antenna. 

They pushed miniaturization further than ever before, yet managed to push performances a notch higher still. It is the smallest and lightest 5.8GHz CP antenna ever made.

Specifications

• Gain: 1.9dbic
• Polarization: LHCP or RCHP
• Cross-Polar Rejection: -15 to -30dB (1.9%)
• Bandwidth: 5.6GHz-6.0GHz
• Radiation Efficiency: 99%
• SWR: <=1.5:1
• Weight: 1.03g to 3.55g depending on configuration
• Dimensions(head): 11.8mm dia. x 8.2mm height
  
• Length: 28mm
• Cable: RG405, RG178, 1.13mm
• Connector: UFL