Duo Couple Sparrow Bird House Nest Whistle Key Holder Chain Ring Keyholder Keychain Keyring Hanger Rack White House (White-Green) Sparrow keyrings are made from solid colour plastic with wooden painted house Bird Height: 2cm Attach the bird house to the wall with 2 screws or use the double sided sticky pads provided House Height: 7.5cm Width: 9cm Depth: 4cm The sparrow also works as a whistle which can be used in the event of an emergency outdoors.