Check the listing for details. DT Systems Micro-iDT PLUS Add-On Collar Dog Receiver Black MAXX-Range 360°. Condition: New, Made in Korea, Republic of. Listed at 114.99 USD. Expand your D.T. Systems Micro iDT PLUS Camo to a 2-Dog or 3-Dog System. The Micro-iDT PLUS, a lightweight trainer collar features a rugged micro-sized collar unit fit in the palm of your hand. The comfortable waterproof collar fits small to large dogs. Plus. The Micro-iDT PLUS Series collar units are alos equipped with MAXX-Range 360 Antenna. The embedded MAXX-Range Antenna is woven into the collar strap and runs along the entire length of the strap, providing extended range without the drawback of an external antenna. Provides 360 degrees of signal reception and is not blocked by your dog's body, regardless of which direction your dog is facing. The collar is also equipped with the SmartLED battery status system. The SmartLED system lets you know when the unit is charging and when the charging is complete.