ITEM NAME:5V 12VUPS Power Diy Plate Charger and Step-Up DC DC Converter Module GYI."CR" LED is the charging status indicator. Product list :1pcs DC DC converter module. 2.1a charging / 2.1a discharging module. Output current: 0-1.2 (5 v);. We'd like to settle any problem in a friendly manner.
