The Niles NI-GS-4 4 All-Weather Satellite Speaker features a weatherproof fiberglass reinforced ABS enclosures that are rugged enough to stand up to any outdoor weather condition as well as to wear and tear from garden equipment. The speakers nickel-plated brass fittings increase durability for long-lasting performance. The adjustable tap switch enables the satellites to operate in either traditional 8ohm mode or in 70V or 100V mode favored by a growing number of installers.