TOOGOO(R) 2pcs Pocket Pet Dog Puppy Cat Training Sound Whistle Keychain Yellow Product Name : Dog Training Whistle;Material : Metal Color : Silver Tone, Yellow;Whistle Size : 4.5 x 0.8cm/1.8" x 0.3" (L*D) Keyring Diameter : 2.5cm/1";Total Length : 7cm/2.8" Weight : 11g