NOTE： ✔ Plug Size - Please check your device by measuring the barrel plug of the power adapter. This cable will only accept 2.1mm (inside diameter) x 5.5mm (outside diameter) plugs. ✔ 2.1mm x 5.5mm plugs are commonly used for 5v, 9v, 12v, 15v and 24v 36 Volt power adapter. However, not all such power adapter uses 2.1mm x 5.5mm barrel plug. Please check the plugs size before purchase. 33FT DC Power Extension Cable 2.1mm x 5.5mm DC 12V Power Extension Cord For CCTV Security Cameras This is 5.5mm x 2.1mm 12v Extension Cord (Out diameter is 5.5mm, the inner diameter is 2.1mm).Fits for any applications, devices and power adapters require DC in 12V power. Package Includes: 2 Pack SIOCEN 33 Foot DC Power Extension Cable Specification Model: Length: 33ft Long Lead: 5.5mm(out size)/2.1mm(in size) 33feet Long DC Power Extension Cable Material: Copper wire inside To Reach longer cable It can be used as a DC 12v extension cord when you find that your Security Camera Power Cable is not long enough.you can connect more than two or three cables to reach longger than 30ft. PLEASE CHECK THE POWER PLUG SIZE BEFORE PURCHASE, DOES NOT WORK WITH OTHER CONNECTOR SIZE Ideal for CCTV IP security camera,LED light strip, rigit strip, LED signage, car, boat, monitors, lighting,printers, sensors, DVR,Standalone,external hard drives,audio mixing and recording equipment, or anything that requires DC in 12v input and accept 12V 2.1mm x 5.5mm plug jack. Applications DC power supply cable Male to Female Extender cord Fits for any applications, devices and power adapters require DC 12V power.Good extension for most security camera with power supply connector. Or LED Strip, Router, Printer, Audio pickup device etc.