Key Features Includes Speedlite & Bare Bulb Heads Wireless Sync with Optional X3 Trigger Compatible with Most TTL Systems 200Ws, 1/512 to 1/1 Power Output Up to 500 Full-Power Flashes Flash Duration: 1/272 to 1/23,500 sec 0.01-1.8 sec Recycling Time, HSS Support Heads with Bi-Color LED Modeling Light Upgraded TFT Screen for Onboard Control Includes Battery & Charger