Outer size: 0.47 x 3.3inch. Open Hole: 2.6-2.9inch. Super bright SMD 2835 Led. Well-controlled beam angle, energy saving light. Operating voltage: AC85V -265V , 50/60Hz . Output voltage: 3-12V 300mA . Long life 50000h, high color rendering property, low light decay. Safe and easy to install, no warm up time required, no noise and no flickering, no IR and UV radiation