A solar-powered, expandable string light system delivering 18 feet of warm white illumination across 10 durable, weather-resistant bulbs String lights store neatly inside an integrated, portable housing unit for tangle-free setup and easy transport to campsite, beach, or beyond Built-in rechargeable 2,000 mAh battery provides up to 20 hours of light per charge; doubles as a mobile charger for small devices Recharges via its high-efficiency solar panel or USB-C for flexible off-grid use; no outlets or extension cords required 100-lumen output across 18 ft (5.5 m) of nylon-braided cable with 10 shatterproof bulbs; IPX4 weatherproof rating; compact and ready to hang anywhere The BioLite Solar String Lights are portable, solar-powered lighting systems designed to deliver reliable, ambient illumination for outdoor spaces like campsites, patios, and off-grid gatherings. Built with weather-resistant materials and housed in a compact, expandable design, each set features shatterproof bulbs spaced along a nylon-braided cord and is powered by a built-in rechargeable battery with USB-C and solar recharging options, plus mobile charging capabilities. No outlets or extension cords are needed, making setup simple and self-sufficient. Available in four styles to suit a range of lighting needs