Small voice, big ideas? Make yourself heard with this ever portable mini megaphone keychain. At 2"wide by 2.5" long, it's diminutive size allows it to be attached to your keys and pulled out at moments notice. Be prepared - you never know when you'll need it! It really works. Adorable, conversation starter - great gift for those that need to be heard! Comes with a keyring attachment. Requires 3 LR44 (1.5V) batteries, included.