Long Lighting: The string light can last at least 48 hours when in continuous lighting, batteries need to be replaced when the lights get dim. Each battery mini light is with ON/OFF switch, easy to operate. Specification: Total length per string: 2M 6.6ft Led Qty per light: 20 pieces Power: 2x CR2032 Lithium Cells (included) Battery life: 48 hours Space between LEDs : 10cm / 3.94inches Voltage:6V Mode:Turn on/off Note: Remove the insulation sheet before use. The battery box is NOT waterproof. To change battery, just use a screwdriver to open the battery case and make sure you put the batteries with the correct position. Package: 9 Pack Fairy String Lights (Batteries Included)