GPS-GSM backpack tracker with double powering system (solar charged battery and backup lithium battery). Lithium battery is in use only when no solar charging. It can collect additional GPS positions. Dedicated for tracking birds in poor light conditions or when feathers can shadow solar charger. Are used on species as: Eagle owl, Cranes and Capercaillies.

For birds from 1600g body mass.
Dimensions 68x28x35mm (LxWxH)
Weight from 45g