Intermediate Big Bite Sleeve sound box The ET-300 Mini Educator employs

The ET-300 Mini Educator employs proprietary "blunt" stimulation making it the most humane and effective e-collar trainer available

This ring is solid black rubber and unlike other versions

Takes 4 "C" Batteries (not included)

Red or black

Made for extended wear

Intermediate Big Bite Sleeve sound box The ET-300 Mini Educator employsFeatures firm oversized 4" bite bar Made from durable bite suit material Available in black only Ambidextrous [split] The Redline K 9 Intermediate Big Bite Sleeve is designed to teach young dogs to open their mouth wide for a great big bite. Featuring an oversized firm bite bar, this sleeve is not designed for novice or soft biters. Constructed with an internal handle and soft cuff, this ambidextrous sleeve is a great tool for developing fuller bites.