ION Audio Solar Sounds rechargeable outdoor speaker, designed to look like a rock. Solar Charging: Features a built-in solar panel to recharge the battery using sunlight. Audio Quality & Connectivity: Provides 30 watts of power and connects wirelessly via Bluetooth. Multi-Sync Technology: Allows linking up to 100 ION speakers together for synchronized audio. Durability: IPX5 water-resistant construction designed for outdoor use in gardens or patios.