Visas may be obtained in advance from Jordanian Consulates and Embassies. There are no vaccination requirements for tourists entering Jordan. It is generally advisable to drink bottled water without ice. English is used in commerce and spoken by many Jordanians. Jordan and Israel are in the same time zone.
Outlets are for rounded, two prong plugs.
Small appliances may require transformers or adapters. The Jordanian dinar is divided into 1,000 fils. In Jordan we had trouble using ATMs. Traveler's cheques and credit cards are fine. Friday is the official weekly day of rest, although many Christian shopkeepers close on Sunday, instead.