The Nitecore LR40 camping lantern has a maximum output of 100 lumens and is powered by a built-in 4000mAh li-ion battery which is rechargeable by USB-C. The warm and white outputs can be used independently or together, ensuring an output that will suit your camping set-up. All the outputs are operated by the single switch on top of the light, simply press and hold to turn the light on and off. Once on, a single press cycles through the modes and turning the dial will increase and lower the brightness level. In addition to the multiple outputs, the LR40 can be used as a power bank. Beside the USB-C port to recharge the light, sits a USB-A output port for keeping your electronic devices charged. The lamp has an LED power indicator next to the dial switch so you know when it's time to recharge.