Petrainer 200 yd Remote Training E-Collar for Samll or Medium Dogs Trainer, 6.18 by 1.96 by 4.09" 270 Yards range for training one dog Powered by batteries--1*6F22/9V, 2*AAA 1.5V 4 modes: static shock/ vibration/ beep/ light With automatic on/off switch on transmitter Featured power saving design with automatic standby and memory function