Efficient energy harvesting solar technology optimized for a variety of light conditions including in Office Slim, yet durable design manufactured from 85% post-consumer recycled materials Utilizes ultra-low power Bluetooth® BLE 5.0 wireless technology requiring less energy that needs to be harvested to operate Multi-device connectivity for up to 3 devices Backlit keys with 3 levels of adjustable brightness Full-size design with 104-key keypad; On/Off power button Rechargeable 1600 mAh lithium-polymer battery via USB-C® cable (included) Convenient battery charge indicator Made with DefenseGuard™ Antimicrobial Protection* which creates a cleaner surface and works continuously to help prevent the growth of microorganisms