ITEM NAME:5V 2.1A 3 USB Power Bank Charger Step Up Boost Module + 18650 Li-ion Shell Kits Reference Title: 5V 2.1A 3 USB Power Bank Charger Circuit Board Step Up Boost Module + 5X 18650 Li-ion Case Shell DIY Kit Features: 100% brand new and high quality. Apply Battery Type: 18650 battery( not include ) Output Voltage: 5V 2.1A Input Voltage: 5V 1A Instructions: Level 4 Capacity indicator Lighting: with LED lights Rated Voltage: 3.7V ( Suit for 3.2V-4.2V. The batteries are in parallel) Specifications: Material: Plastic + Electronic components Shell Color: Random.(Apply Battery Type: 18650 battery(not include ). Instructions: Level 4 Capacity indicator. 1 X Plastic Shell(with a Circuit Board inside). The batteries are in parallel). Shell Size: 140×64×22mm/5.51×2.52×0.87in.