LUXMO LUXURY MOBILE Luxmo Remote Control Dog Training Collar Vibration Ultrasound and Corrective Shock for Small Medium Large Dogs (04) Recommend for dogs from 20 to 100 pounds. 100 levels of vibration & static.LCD digital remote screen The system can be used for 1 or 2 receivers(additional receiver must be the same type) Adjustable nylon collar (from length 5.9