Dear，Pls leave a massage to tell us what design (Color) do you want.thank you.

1.adopting industrial master chip.2.LCD display.3.Charge and discharge is available.Its parameters can be adjusted by yourself.4.Fully 4-stage PWM technology works for it.5.Short-circuit protection， open circuit protection and reverse polarity protection.6.Automatic recovery program.7.With double MOS， calorific value is low.Specifications: -Rated Voltage: 12V/24V(Auto recognition)-Rated Current: 10A 20A 30A-Charging Mode: PWM-USB output: 5V/2A-Self-consume: <10mA-Operating Temperature: -35 ~ 60 °C-Storage Temperature: -35 ~ 60 °C-Color: Blue Package Included:1X Solar Charge Controller 1X User's Manual