Aom Shoppy

รายละเอียดของสินค้า 2in1 Round Jack 5.5mm * 2.5mm to Square End Pigtail and USB for Thinkpad (Black) - intl Features:
It is not only a Conversion interface for Computer , but also as a USB interface. It can provide 5V 1A current charging interface for your mobile phone or other devices.
Easy plug and use.
You can connect this adapter between old type round jack to latest laptop with square DC input port.
5.5 x 2.1mm Male round jack can fit most of the universal AC adapter DC output jack.
For new generation of the IBM, for Lenovo & Thinkpad laptop.

Specification:
Input terminal(Female): outside diameters 5.5mm, inside diameter 2.1mm (Compatible with 5.5*2.5mm Jack)
Output terminal(Male) 1:  New Square Port Ordinary Power interface
Conversion end: New square with needle (Super Yoga series, etc.)
Voltage: 20V
Electric current: 4.5 (Max)
Suitable for X1 Carbon and later using square interface 65W 90W power adapter.
USB Output: 5V 1A
Product size: approx. 224*25*13mm/8.81*0.98*0.51''
Net weight: approx. 28g

Note:
It is manual measurement, there may be 1-3mm error. And item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.hope understanding.