Impressive Volume for Its Size – A custom 5W neodymium driver delivers clear, balanced audio, while the passive bass radiator adds balanced bass from the compact design. Designed and engineered by Cambridge SoundWorks in the USA. Up To 100-Foot Bluetooth Range – Advanced antenna technology provides a reliable wireless connection from up to 100 unobstructed feet away. Connects with smartphones, tablets, computers, and compatible Echo devices. Weather-Resistant Design – Built to handle gentle water spray and everyday splashes for use at the beach, poolside, on a golf cart, or while traveling. The speaker must not be partially or fully submerged. Compact With 14-Hour Playtime – Provides up to 14 hours of playtime at two-thirds volume. Weighing under 8 ounces and measuring 3.9 inches long by 2.8 inches tall, the OontZ Solo is easy to carry and travel with. Convenient Built-In Features – Use the built-in microphone for hands-free calls or connect other non-Bluetooth devices through the 3.5 mm AUX input. Includes a USB charging cable and carrying lanyard.