Specification BatteriesRequired : 1 Brand : Generic BulletPoint1 : WanSen AC-04 Set with 4 Channels. BulletPoint2 : The highest synchronous speed can reach 1/250 sec. BulletPoint3 : Suit for Sony DSLR camera with single-point hot shoe. BulletPoint4 : With cable connect camera and , even your camera without hotshoe, you can use the . BulletPoint5 : Maximum Working Distance: 30m (open area, without interference). Color : Red ExternallyAssignedProductIdentifier : 7627001665361 ItemName : Generic Universal AC-04 4 Channels Wirel Radio Studio Set for Strobe ItemPackageDimensions_Height : 3.5 centimeters ItemPackageDimensions_Length : 17 centimeters ItemPackageDimensions_Width : 12 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : remote-flash-units Manufacturer : Generic ModelName : Parts & Accessories ModelNumber : DUGFSFWE5TFB2H2034K17G91I NumberOfItems : 1 NumberOfLithiumMetalCells : 1 PartNumber : PT-XVUSZQX240318-D1267 ProductDescription : Specifications: Power: - Power: 23A / 12V - Power: 110- AC Channel: 4 Working Distance: 30m (open area, without interference) Synchronous speed: 1/250 sec Package size: 17 * 12 * 3.5cm / 6.7 * 4.7 * 1.4in Package weight: 135g / 4.75oz