All speakers in the Home Indoor Series are built with high-quality, durable materials, making them some of the best wireless speakers on the market. For instance, the OTR speakers have a robust build, ideal for portable use. Variants like the OTR Metal use sturdy metal, and the OTR Wood utilizes natural wood for a unique aesthetic while still ensuring durability. Their rugged construction and thoughtful design make them highly resilient, perfect for taking your music on the go.