Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: GPK 40w Power Adapter White for MSI Wind L1300-441us L1350-1256us L1350-430us L1350-431us L1350-436us L1350d-1672us L1600-011us U100-013us U100-451us U100-641us U110-031us U123-002us U123-019us U123-033us U125 U130-416us U130-417us U135 U135-205us U135-206us U135-208us U135-210us U135-411us U135-413us U135-415us U135-628us U135-643us U135-644us U135dx-1208us U160 U160-006us U160-007us U160-412us U160-412us U160dx-472us X400-204us X400-205us Ac Adapter Power Cord Charger
Product description: The GPK systems Laptop AC Adapter is an inexpensive alternative to an original power supply and you won't notice any difference in performance. This is the perfect opportunity to get an extra power supply, e.g. for work or study purposes, or to replace the original if you've lost it. The adapter enables you to simultaneously operate your system and charge its battery from electrical power outlets.
Product feature: Input: 100 - 240 V (worldwide use), Power: 20V 2A 40W, Service & Support 1 year warranty, Designed exclusively for use with the laptops 100% compatibility with the original, Replacement power supply AC power adapter was tested to match and/or exceed original product at low price.
Product brand: GPK
Target attributes: Wireless Charging Type
Answer: attribute: wireless charging type
value: None
source: None