Moonlite 12 Volt, 2 Watt, Telrad heater. Like new. Works great. Jack is RCA type, but changing is easy. I sold the scope that I used it with. New price is $21 plus shipping. My price is $17 firm, shipped CONUS. I prefer payment by Money Order. Sorry, I don't do PayPal. Please note my Astromart rating. Thanks for looking.