SMAKN&reg; 12V 10A 70W MPPT Solar Battery Charge Controller Waterproof IP68 IP68 waterproof level and aluminum outer shell is able to effectively prevent various kinds of corrosion. Automatic identification of 12V system voltage. LED digital display and waterproof key-operated operations, which makes use simple and convenient. Various kinds of status indication. Protection againse over-charge, over discharge and overload, protection against electronic shortcircuit and reverse connection.