Features： 1、Monocrystalline Silicon Material: The solar car battery charger uses monocrystalline silicon material, which has high battery efficiency and long term stable output. Suitable for home, industry, business, etc 2、Impact Resistance: The solar car battery charger uses high transmittance low iron tempered glass to enhance stiffness and impact resistance. Plug and play 3、LCD Display: The controller has a large screen LCD display, with adjustable charging and discharging parameters, with power off memory function 4、Short Circuit Protection: The controller has 3 stage charging management, with built in overcurrent, short circuit, open circuit, reverse connection protection, etc., all of which are self recovery types 5、Scope of Application: Suitable for any place where you can get sunlight, for outdoor activities, car, yacht, boat charger. Suitable for home, industry, business, etc Specification： Item Type: Solar Car Battery Charger Material: Monocrystalline Silicon, PET Laminate Product Size: Approx. 38 x 28cm / 15.0 x 11.0in (manual measurement allows for errors) Solar Panel Type: Monocrystalline Silicon Solar Panel Power: 30w Temperature Coefficient of Solar Panel Isc: (010+/-0.01)%/C Temperature Coefficient of Volatile Organic Compounds for Solar Panels:-(0.38+/-0.01)%/C Temperature Coefficient of Solar Panel Power Voc: -0.47%/C Solar Panel Temperature Range: -40℃ to +80℃ Controller Current: 50A Controller Maximum Photovoltaic Input Power: 660W (12V), 1320W (24V) Controller Standby Current: <10MA Controller USB Output: Dual USB Output, 5V/2.5A (maximum) Controller Operating Temperature: -35℃ to 60℃ Package List： 1 x Solar Car Battery Charger 2 x Spare PV Connectors 2 x Copper Cores 1 x Solar Panel User Manual 1 x Controller 1 x Controller User Manual