gyzmofreakz LED Display Power Bank Charging Module Circuit Board - DC-DC Step Up Boost Power Supply Module - 5V 1A and 2.1A Dual USB with LCD Monitor Electronic Components Electronic Hobby Kit

Equipped with LED lamp with push button switch control on/off, Board Size: 66 X 18 X 16mm/2.60 X 0.71 X 0.63inch(L*W*H) Output load indication: press and hold the LED light button after the load is turned on, the output will start, the display will show OUT letter and relative output voltage. Micro USB input: 5V 1A USB output: 5V 2.1A / 5V 1A ( Dual USB interface) Charging display: intelligent digital display Product size: 57mm point x 28mm Screen size: 27 mm x 17 mm The capacity is not more than 200,000 mA, and the voltage is 3.-4.2V.Overcharge protection | Overdischarge protection | Overcurrent protection | Supported connection methods: It is possible to connect only one lithium battery or multiple lithium batteries in parallel. The capacity of connected battery is no more than 200,000 mAh, As long as the battery with a voltage of 3.0-4.2V can be used.