The product is a pack of 4 AA rechargeable batteries designed for solar lights, with a voltage of 1.2V and a capacity of 600mAh to 1000mAh. These NiMH batteries are suitable for low drain devices and solar/wind applications. Manufactured in China by the brand Solar, these units are ideal for powering various sound and vision devices. Each pack includes two sets of four batteries, providing a reliable and long-lasting power source for your solar lights.