Einstein e-Collar Mini Educator 1/2 Mile Remote Dog Trainer ET-300 ET-302. The Educator ET-300 is a 1/2 mile range trainer loaded with unique features making it the most humane and effective trainer available. The smaller transmitter is especially well-suited for smaller hands or in situations where discretion is important. Dog Size: 5 lbs. 100 Levels with “Lock and Set” (Patent Pending). Night Blue LCD Display. Instant Adjustable Booster Buttons. Momentary and Continuous Buttons. Tapping Sensation Button (Improved Vibration). 2 Hour Quick Charge (Li-Polymer Batteries). Completely Waterproof to 500. Shock ResistantRead More