Model Number: YH-S03-1 Brand Name: YH Key Specifications/Special Features: Battery capacity: 4000mAhBattery cell type: polymer batteryRated input: DC 5V-1ARated output: DC 5V-1A/1.5A, double USB outputRecharge cycles: ≥500 timesWith LED torch, four power level showProtection functions: built-in protection functions for short-circuit, over-charge/over-discharge/over-heatingAttached connectors micro mini USB Model YH-S03 Capacity 4000mAh Battery type polymer battery Input 5V-1A Output 5V-1A/1.5A, double USB output Size 142*75*13.5mm Weight 210g Color blue/black/white/red/green/yellow/purple/rose red