Sqlszt Power DC 5V Adapter Extension Cable 10ft 1.35mm x 3.5mm Compatible with DC Adapter Cord Fit for CCTV Security Camera Wireless IP Camera Standalone DVR White Buyer purchase this cable must attention as following: The safest way to make sure if the extension cable plug you purchase compatible with your power adpater is measuring the inner diameter and outer diameter of the plug of the power adapter by vernier caliper.Measuing with vernier caliper is most accurate,it can make sure that you don't buy wrong product and save time for you. Extension Cable Sizing: it is 6.6feet long,the inner diameter is 1.35mm and outer diameter is 3.5mm,Male to Female DC plug extension cord. it only work with 1.35mmx3.5mm power adapter DC plug cord. Compatility and Application: compatible for LED light strip, rigit strip, LED signage, and any brand CCTV security camera and wireless ip camera with 5V 1.35mmx3.5mm Power Adapter plug cord, lighting, car, boat, monitors, printers, sensors, DVR, external hard drives, audio mixing and recording equipment, or anything that requires DC input and accept 5V 1.35mm x 3.5mm plug. Usually it work with foscam ip camera of R4 R2 and All the 5V DC power plugand all the 5V DC power adapter wireless/wired ip camera It don't work with 12V 2.1mm x 5.5mm Plug The sqlszt is registered trade mark in usa,the product quality is guaranteed,if you don't satisfy with the product quality,your money back is 100% guarantee. if customer need to make sure if my prodcut compatible with your power adapter plug,please freely email us at: woaini198371@126.com