Esky174; 330 Yards Remote Training E-collar Rechargeable Waterproof Dog Training Collar LED backlight, Rechargable, Both collar and remote are rechargable. No extra batteries is needed. modes: static shock/ vibration/ beep/ Multichoice for dog training, It can provides a professional 100 level shock and 100 level vibration. Power Saving, The collar and remote will be into standy mode if no operation in certain time. Expandable, The system can be expanded with 2 receivers; Adjustable belt from length 5.9 Convenience, Easy-to-read LCD screen shows the stimulation level. Over 3,000 different identity codes to prevent conflicts with other e-collars. Patent product, all Esky branded dog collars are patented product(have the patent number on both the remote and collar)Quality is much better than that of knock-offs.