"keeps other pets outside
with collar magnet for access permission
transparent flap, silent action
with special sealing and magnetic lock
incl. tunnel element
depth 10–35 mm
can be extended with more tunnel elements
total measurements 21.1 × 24.4 cm
cut out size 16.5 × 21.6 cm
flap size 14.7 × 15.8 cm
battery-operated (9 V battery not included)"