Key features of the FlickerGPS Line:

• Ultra-light, with the FCH variant starting at 3g including case and antenna! (the lightest cell-enabled unit on the market!)
• Over-the-air updates
• No data plan required - all data is included in the price!
• Data receipt and over-the-air updates controlled by custom smartphone app

Limitations:

• Only works within cellular range (LTE)

Additional features of this variant (Necklace):

• Provides a solar-rechargeable necklace form factor for species that are better served by this attachment method
• 12g unit has internal cell antenna