The KwikBoost EdgePower Constant Use Bundle includes 12 Rechargeable Batteries, 6 Clamp-On Desktop Charging Units, plus a 9-Bay Base Charging Station. This system is ideal for medium-to-large rooms where users require continual access to supplemental power. Each EdgePower Clamp-On Desktop Charging Unit features an innovative design that easily attaches to most tables and desktops. Once connected, each unit offers a standard AC outlet, a USB-A charging port, and a USB-C PD charging port. When loaded with freshly recharged EdgePower Rechargeable Batteries, you have enough power to charge typical laptops up to 2 times, average Chromebooks or tablets up to 4 times, and standard smartphones up to 14 times. If desired, each Desktop Charging Unit can also charge a laptop and 2 mobile devices simultaneously.