CollarCollar length adjustable from 8 inches to 20 inches.Water Resistant and shockproof.Length 43mmHeight 68mmWidth 38mmWeight 110g (module + battery)Power 2* 1.5V AAA battery (included)Handset LED signal light and illumination at night The sound function for attracting attenion.Water Resistant Item is brand new in box.Length 120mmHeight 25mmWidth 45mmHeight 3.39"Weight 110g (with battery)Power 2*1.5V AAA battery (included)Package Includes1 x 2 Level Remote Control Dog Training Shock Collar