Build-in Godox 2.4G Wireless X System: -Optic transmission with even illumination and stable output. -Build-in 2.4G wireless transmission offers all-in-one functions and 100 meters further transmission distance. Full Support TTL Functions: Function include TTL auto flash, Manual Flash, 1/8000s High-speed sync, Flash Exposure Compensation, Second Curtain Sync, etc. Master & Slave Flash: -As a master flash unit to control Sony camera flashes e.g.HVL-F60M, HVL-F43M and HVL-F32M via wireless; -As a slave flash unit under control of Sony camera flashes e.g. HVL-F60M, HVL-F43M and HVL-F32M. Powerful & Convenient Li-ion Battery: -Max. 1.5s recycle time & 650 full power pops. -Forget the heavy burden and messy batteries’ charging and handling. -2000mAh lithium batteries ensure better shooting performance. More Functions: -GN60 (m ISO 100 @ 200mm) and 22 steps of power output (1/1-1/128) -Support TTL/M/Multi/S1/S2 modes -Auto/Manual zoom head from 20 to 200mm. -Allow for USB firmware update. Specifications: Channel: Optical: 4(1, 2, 3, and 4); 2.4G: 32 (1-32) Slave-Ready Indicator: Yes, two red indicators blink Modelling Flash: Fired with camera’s depth-of-field preview button Auto Focus Assist Beam Effective range (approx.): Centre: 0.6-10m/ 2.0-32.8 feet; Periphery: 0.6-5m/ 2.0-16.4 feet Power Source: 11.1V/2000mAh Li-on polymer Battery Recycle Time: <1.5 seconds. Red LED indicator will light up when the flash is ready. Full Power Flashes: approx. 650 Power Saving: Power off automatically after approx. 90 seconds of idle operation. (60 minutes if set as slave) Sync Triggering Mode: Hot shoe, 2.5mm sync line, Wireless control port Panel: Wide LCD panel, backlight on/Off Colour Temperature: 5600±200k Size: 64 x 76 x 190 mm Weight without battery: 430g Weight with battery: 540g