Godox Wireless X System The built-in 2.4 GHz wireless X system, with the help of the division into 16 groups (0-9, A-F) and 32 channels, facilitates the creative use of multiple light sources. 99 wireless ID settings (01-99) limit interference from other nearby systems. Additionally, the AD200Pro II has a 3.5mm sync port for setting up a wired connection. 500 Full-Power Flashes The AD200Pro II maintains a stable output, providing 10 steps of extended output power with adjustability from 1/512 to full power 1/1 in 0.1 stop increments. It runs on a removable and rechargeable 14.4V/2900mAh lithium battery that will give you up to 500 full power flashes and thousands of lower power flashes. Godox conveniently includes the charger in the box. Besides that, the AD200Pro II can work with an optional PB960 power box. Stable Color Temperature Mode A dedicated stable color temperature mode improves color consistency to within +/- 100K throughout the entire power range. Adjustable Bi-Color LED Modeling Light At 5800K, the AD200Pro II is well-suited for portraits, weddings, and other types of photography. Both of the included flash heads come with a bi-color LED modeling lamp adjustable from 2800 to 6000K. These LED modeling lights output 1400 lux at 3.3′ and can be set to proportional to mimic the effects of the flash’s power setting for pre-visualizing your final shot, or can be adjusted from 10 to 100%. The H200J II provides up to 5.5 hours of continuous modeling light, while the H200 II offers up to 6 hours.