1/2 mile range Stimulation levels 1 to 100 Configurable boost level Uses RX-090 receivers Shock proof and water proof E-Collars may ship separately [split] The ET-300 Mini Educator employs proprietary "blunt" stimulation making it the most humane and effective e-collar trainer available. Assembled in the USA, E-Collar technologies systems are completely modular. A one dog system can be configured for second dog or plus system with an additional receiver. The Mini Educator from E-Collar Technologies is loaded with features. The transmitter is configurable for stimulation levels from 1 to 100 with the ability to "lock and set" the stimulation level. Features a configurable boost setting from 1 to 60. Alternative stimulation options include vibration and tone. Receivers have a light that can be activated from the remote and set to flashing or solid. RX-090 receivers are low to medium power receivers suitable for dogs 10 pounds and larger. Each receiver, without any contact points installed, weighs roughly 2.3 ounces and measures 2.5" x 1.5" x 1.5". A single RX-090 receiver is more than enough power for most dogs for most applications. Very stubborn or hard-headed dogs, and working dogs engaged in bite sports, military or police activity may require multiple receivers. E-Collars may be subject to additional anti-fraud screening. If there is a problem with your order we will contact you. Standard Package Contents 1 - 1/2 Mile Remote Transmitter (Black or Yellow) 1 - RX-090 Receiver 1 - 3/4" Biothane Collar (Black) 1 - Dual Lead Charger 1 - Set of Standard 3/4" Contact Points 1 - Set of Standard 5/8" Contact Points 1 - Accessory Package (Test Light, Skin Removal Tool, Contact Point Removal Tool) 1 - Lanyard 1 - Owners Manual ET-302 (2 Dog System) Additional Contents 1- Additional RX-090 Receiver 1- Additional 3/4" Biothane Collar (Red) 1- Y Splitter for Charging 1- Additional Set of Standard 3/4" Contact Points 1- Additional Set of Standard 5/8" Contact Points ET-300 Plus Additional Contents 1 - Additional RX-090 Receiver 1- Y Splitter for Charging 2 - 3/4" Biothane Bungee Collars (Replaces standard collar) 1 - Additional Set of Standard 3/4" Contact Points 1 - Additional Set of Standard 5/8" Contact Points 1 - Plastic Carrying Case