The ZEPHIRA battery-powered spa vacuum quickly eliminates sand, gravel and other debris from the bottom of your spa. It is also suitable for small pools and spot-cleaning. The battery-powered cleaner does not need any hose connection or electrical cord. Debris is vacuumed up into a durable, stainless steel filter cage, and its transparent body shows when the filter is full. When necessary, the filter cage can be easily removed, emptied, and replaced.