MPPT Solar Panel Regulator Controller Solar Panel Charger Board Controller Module 12V Lithium Battery Charge 3.7V 4.2V CN3791

Input voltage: 6V/9V/12V Output voltage: 3.7V (nominal)/4.2V (full charge) Max charging current: 2A PWM switching frequency: 300KHz Charging voltage: 4.2V ± 1% Working environment temperature: -40 ° C to +85 ° C Size: 45X20X9.5mm Material: plastic Color: blue