Testo K. K.® testo477 LED Stroboscope　5634770 5634770

Light emitting frequency: 30 - 300,000FPM (0.5 - 5,000Hz)
Accuracy ±1 digit: 0.02% of settings (display value) (±1 digit)
Resolution: 0.1 (at 30 - 999FPM), 1 (at 1,000 - 300,000FPM)
Display: LCD, 6 digits number display
Light emitting part: White color LED x 7 (color temperature approximately 6,500K)
Illuminance: 1,500Lux (at 6,000FPM/20cm)
Light emission time (variable): Available to set arbitrarily (1μs - 5% of light emitting period)
Default: 1/180 of light emission period (approximately 0.56%)
Phase adjustment function: Adjustment angle 0 - 359° (1° increments)
External trigger input: Photo coupler input, Voltage/3 - 32V, Minimum pulse width/50μs
External trigger output: Photo coupler (open collector) output, Maximum voltage 32V, maximum current 50mA
Division function at the time of external trigger input: 1 - 255
Operation temperature: 0 to +45℃
Battery type: AA alkali dry cell x 3 or NiMH rechargeable battery x 3
Battery life: AA alkali dry cell/approximately 5 hours (at 6,000FPM light emission), NiMH rechargeable battery: Approximately 11 hours (at 6,000FPM light emission)
Protection grade: IP65
Housing material: ABS, Aluminum
External dimensions (L x W x H): 191 x 82 x 60mm
Mass: Approx 400g (including battery)