High quality USB load resister 15w discharge tester Interface adjustable constant current mini household electric with fan

note :the item comes without retail box

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Description:
1. Application:DC 3.7V-13V
2. Current:0.15A-3A(Adjustable)
3. Power:15W
4. Size:68*23*30mm
5. Fan will start when the temperature exceeds 40Centigrade.