Technical Specifications:

• Standard 2.1mm DC Power/Pigtail Male Plug
• 5.5 mm (outside dimension)x 2.1 mm (inside dimension)
• Color Coded power connecter Red (+) for Positive and Black (-) for Negative to simplify installations. 
• Used to connect to camera power so you do not have to cut plug which in most cases will void warranty
• Convenient and cost effective way to power up 1 cameras with power adapter
• Length: About 26cm
• The Maximum load of current: 12V 30A
• 10pcs