Solar Panel Regulator Charge Controller USB 60A 12V-24V With Dual USB Charger Features: 100% brand new and high quality. Build-in industrial micro controller. One-key setting,digital display,auto memory function. Fully 4-stage PWM charge management. Build-in short-circuit protections, open-circuit protections, reverse protections, over-load protections Dual mosfet reverse current protections, low heat productions. With double USB ports charge Free One pair Anderson Style Plug included The Regulator is only suitable for lead acid batteries:OPEN, AGM, GEL It is not suited for nickel metal hydride, lithium ions or other batteries Specifications Rated Voltage: 12V 24V Auto Application: Solar System Controller Rated Current: 60A Max. PV Voltage: 60V Max. PV Input Power: Size: 133 x 70 x 34mm Safety Instructions: Make sure your battery has enough voltage for the controller to recognize the battery type before first installation. The battery cable should be as short as possible to minimize loss. The regulator is only suitable for lead acid batteries: OPEN, AGM, GEL It is not suited for nickel metal hydride, lithium ions or other batteries. The charge regulator is only suitable for regulating solar modules. Never connect another charging source to the charge regulator. System Connection: Connect the battery to the charge regulator - plus and minus. it will show 1, if it detects 12V battery, 2 if it detects 24V battery. Connect the photovoltaic module to the regulator - plus and minus. Connect the consumer to the charge regulator - plus and minus. Package Includes 1 x Solar Panels Battery Charge Controller 1 x User Manual