Description 5V 1A Micro USB Interface 18650 Lithium Battery Charging Board Charger Controller Module Protection Dual Function Charge Control Product parameter: 1. Input voltage: DC4.5V-5.5V; IN IN- pad wiring or MicroUSB 5V input; 2. Full charge voltage: DC4.2V; 3. Charging current: 1A adjustable; 4. With charging indicator; 5. Working temperature: -10℃~ 85℃;