The electrical current is 220 volts, 50 cycles alternating current (AC); wall outlets in most of the region take 15-amp plugs with three round prongs (the old British system), some take the European two narrow prongs, and a few take the straight-edged three-prong plugs, also 15 amps.
If your appliances are dual voltage, you'll need only an adapter. In remote areas (and even in some lodges) power may be solar or from a generator; this means that delivery is erratic both in voltage and supply. In even the remotest places, however, lodge staff will find a way to charge video and camera batteries, but you will receive little sympathy if you insist on using a hair dryer or electric razor.
Consider making a small investment in a universal adapter, which has several types of plugs in one lightweight, compact unit. Most laptops and mobile phone chargers are dual voltage (i.e., they operate equally well on 110 and 220 volts), so require only an adapter. These days the same is true of small appliances such as hair dryers. Always check labels and manufacturer instructions to be sure. Don't use 110-volt outlets marked for shavers only for high-wattage appliances such as hair dryers.