Product details:

White finish. Molded polycarbonate horizontal housing. Contemporary round lily miniature low-voltage track head. Dimmable with ELV dimmer (not included). Patented embossed polarity arrows on adaptor bottom and spring-loaded positive latch. Compatible with Juno Trac-Master systems. On/off switch. "Pull-up" contact to "up" position for 2-circuit application. GU5.3/GX5.3 ceramic bi-pin socket. Transformer with short circuit protection. UL and C-UL listed. Die-cast aluminum lamp holder. 90-degree vertical aiming and 358-degree rotation. Measures 4 5/16-inches high, 2 7/16-inches wide. Takes maximum 50W MR16 low voltage halogen bi-pin glass bulb, or one MR16 LED bi-pin bulb (bulbs not included).