Paris' Newest Accessory -- It's Off the Chain!

TMZ has the lowdown on the electronic monitoring device that will adorn Paris Hilton's ankle for the next 40 days. Luckily, it's black and will match anything she wears! Swarovski crystals not included!

L.A. County law enforcement officials tell TMZ Paris is wearing the Sentinel DualTrak ankle bracelet, which operates on a radio frequency and comes with a Home Monitoring Unit. The heiress must stay within 500 feet of the unit. The bracelet, which has an internal backup battery life of 50 hours, snaps on, so Paris won't need to worry her purty little head with any tools or complicated strap harnesses. Get your mind out of the gutter! For hygienic reasons, the bracelet also comes with a disposable back plate, which eliminates any tedious cleaning on Paris' part. Phew!

Law enforcement officials tell TMZ that Paris' house arrest does not come with any provisions regarding visitors or restrictions on alcohol use.