TO FIT BT HOMEHUB 3.0 TYPE A ROUTER POWER SUPPLY ADAPTER MAINS PLUG 12V AC DC UK
Connector / tip size : 2.0x0.5mm,2.4x0.7mm,3.5x1.35mm. 3.0x1.0mm,4.0x1.7mm,4.8X1.7mm. 5.5x2.1mm,5.5x2.5mm,5.5x3.0 mm. Output Power: 24 W or below. DC Connector polarity: Positive inside, Negative Outside.