Model: JY-680 Color: Black Plastic housing material Flash light color: White Color temperature: 5500K Guide number: 54/190 (ISO100 in meters/feet, focus range 105mm) Flash coverage: 24~105mm (14mm with wide panel) Flash duration: 1/1050s Flash recycling: 0.5~5s Wireless transmission range: indoor 12~15m/39.4~49.2ft, outdoor 8~10m/26.2~32.8ft Reception angle: 40 degrees (horizontal) / 30 degrees (vertical) Assist light effective range: 0.6~5m / 2.0~16.4ft Battery power: 4 x AA batteries (not included) Power saving after 3min idle operation, power-off after 120min idle operation Package includes: 1 x Flash Stand 1 x Protective pouch 1 x Flash diffuser 1 x Chinese & English user manual