ITEM NAME:5PCS 5.5 x 2.1mm Female DC Power Jack Connector Adapter Wire Cable DC Power T4D2 5PCS 5.5 x 2.1mm Female DC Power Jack Connector Adapter Wire Cable DC Power T4D2 Usage temperature: -68 celsius -50 celsius Wire material: pure copper (Cu), conductive, low heat transfer Joint material: copper + arc appearance galvanized (non-iron head) Wire plastic: Anti Rel sun / antioxidant PVC flame retardant plastic Connector polarity: inner positive + (red line); Outer negative (by black line) Joint specification: outside diameter 5.5mm * 2.1mm diameter Maximum transmission: 3a Maximum transmit power: 72 W Transfer voltage: 1 V ~ 38 V Total length: 30 cm Voltage of: 12 V Package Includes: 5 x Female DC Connector With Cable Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Joint material: copper + arc appearance galvanized (non-iron head). Connector polarity: inner positive + (red line); Outer negative (by black line). Wire material: pure copper (Cu), conductive, low heat transfer.