The Educator Dog Ecollar 5v Charger is a product designed for dog owners who use E-collar Technologies products. This charger is compatible with several models, including the ET-300, ET-300-L, Zen-300, ET-302, K9 400, and 402. It is a dual lead charger with a 5-volt output. The product is sold by Pithespy, an authorized seller of ECollar Tech products. The charger is manufactured in China and is not modified or customized.