A USB cable is included in the packaging. Simply plug in and charge, the red light will go out when fully charged in approximately a couple of hours if totally flat. The charge will last for 2 / 3 hours depending which mode you have it in and you can charge the band approximately 2,000 times.
The LED Flashing Collar/Band in Yellow lights up with orange bulbs, there are three modes – fast flashing, slow flashing and constant. Each loop can be cut to size to fit any dog, just open the connector, pull off the lug and cut to size, replace the lug and connect back together. Great for those dark night walkies.