Aetertek Replacement/Spare Charger Waterproof Rechargeable Trainer Dog Training Shock Collar System(NOT for AT-216D,AT-918C,AT-919C) Dual charger with 2mm charging pins for Aetertek model AT-216 dog training collar system( NOT for AT-216D). This charger has two 2mm charging pins that won't charge models with 5mm charging port including AT-216D AT-919C,AT-918C. Universal charger(110-240V/50-60Hz) with USB charging cable(can charge via USB port), output 5V, 500mAh.