REPELL 3-in-1 Solar Animal Repeller Features not 1 or 2, but 3 proven technologies that send unwanted critters packing. Sounds ring out up to an ear-splitting 110 dB. Emits ultra/infrasonic frequencies that drive pests mad. 6.5" x 6.5" x 3.75" Solar panel with 4 rechargeable NiCad batteries.