Electronic construction: Automatic silicon-controlled rectifier and series circuitry.
Manual control: full output (5 manual settings from full power down to 1/16 output.
Flash Range: 0.6 to 20m (2 to 65ft)
Operating Modes: TTL, Auto, Manual and Strobe. 6 settings from f/2.0 to f/11 (ISO 100) in automatic mode.
Angle of coverage: 78° horizontal and 60° vertical 24mm wide angle lens.
Recycling time: Approx. 7 seconds minimum (full discharge)
Power source: Four 1.5V AA-type alkaline-manganese or NiCd AA batteries or SD-7 battery pack
Dimensions (without mounting foot): Approx. 80mm x 131mm x 100mm (approx. 3.1″ x 5.1″ x 3.9″)
Weight (without batteries): Approx. 390g (13.7 oz)
Other features: Ready-light, rear curtain sync with capable Nikon AF SLRs; accumulator connectors for external power pack and TTL-Multi-Flash connector. Light sensor for auto flash; IR-LED for AF-assist for handling light in low-light situations but not operative when using Continuous AF-Servo or Manual mode.