This STEM kit will teach youhands-on how to apply scientific concepts in real life all whilebuilding yourown customizable solar light BYOL includes: 3 modular disks 1 transparent cover 2 USB cables 16 LEDs and 1 activity booklet Manufacturered by MPOWERD. With 10 white LEDs + 6 RGB LEDs BYOL can use any combination of 10 LEDs at once BYOL charges in 7 hours of direct sunlight or in 2-3 hours via USB and lasts up to 24 hours Build-Your-Own-Luci (BYOL) opens the door for bright young minds to learn about the power and potential of clean energy Battery level indicator that lets you know exactly when to recharge your BYOL in the sun or via USB MPOWERD offers a 1-year manufacturers warranty on all MPOWERD products sold by authorized sellers