large capacity ni-mh battery and powerful solar panelour decorative lights have strings with 20 leds and large capacity ni-mh battery each,requires no external wiring.get full charge within 6-8 hours under the sunlights,and lighting at lasts for 8-10 hours^ Environmental protection and energy savingNo wiring required. No communication. It stores energy from the sun during the day and turns on automatically at night. The way to install these solar mason jar lights is to hang them in a place that absorbs sunlight during the day, or use them as mason jar decorative lights on the floor or table. There is a switch under each mason jar lid light. Turn it on before charging with solar energy^ RomanticThe very popular mason jar firefly lamp can DIY the abandoned mason jar into a fairy-tale dreamlike atmosphere, and the fairy lamp in the jar can well decorate your apartment. Hanging on any place, such as terrace, garden, bedroom, also suitable for parties, weddings, Christmas, Halloween, Thanksgiving, to create a romantic and warm atmosphere for the family^ WaterproofIP65 waterproof grade(Pls screw the lids on jars tightly by hard),no need worried hanging outdoor,great for garden,yard,patio,front door,Christmas decorations,just need hanging it anywhere which you want(suggest under the sunlightdirectly for better charging)^ Multiple usesThere are 2 ways to install these solar lights. Hang these solar lights in a place where you can get sunlight during the day, or put the solar lights on the outdoor ground or table