1/2/5/10PCS DC 3.7V 4.2V Step Up 18650 Li-ion Battery Charger Board Boost Module
Nano Sheild. 1/2/5/10 x Step Up Boost Module. hope you could understand. Charging current: Max. Discharging current: Max. Due to the difference between different monitors, the picture may not reflect the actual color of the item.