Lamp: 3W LED
Input: Micro USB 5V DC5.5MM 4.2V
Output: DC5.5mm 3.7-4.2V/USB 5V 2A
Battery: 1-4 pcs 18650 rechargeable batteries(need to bring your own)
Port: USB*1 Micro USB*1 DC5.5MM*1
Dimension: 43*43*105mm
Packing: portable bag*1/charging cable*1/manual*1
Certification: FCC, CE, RoHS
Warranty: 1 year