Setting up your LYMA Laser is simple. Firstly unscrew the end cap on the LYMA Laser and remove the battery, before connecting the battery charger to a powered USB socket and inserting the battery. When theblue LED lightsin the battery charger are illuminated, the battery is fully charged. Re-insert the fully charged battery back into the LYMA Laser (with + facing outwards) and screw down the end cap. Your LYMA Laser is now ready for use. For optimal results, prepare the skin with the LYMA Oxygen Mist and Glide when using the Laser.