Adjustable Frequency 45Hz to 400Hz AC Power Supply specifications: 

• AC-DC-AC frequency conversion technology, Controlled & tested by 16 bits MCU
• Protection for over hot, thundering voltage and current
• Total voltage distortion: ≤0.2%; Voltage stability: ≤0.05%/30min
• Load adjust rate: ≤0.05%; Frequency stability: ≤0.01%/30min
• Output voltage range: AC 0.0~300.0V, Output Frequency Range: 45~70Hz, 100Hz, 200Hz and 400Hz
• It is pure sine wave AC power source with low harmonic and high accuracy
• Input Power: 220V and 50/60Hz (110V can be option)
• Communicate with PC via software, the Voltage & Current set by the software and Power Output can be remote controlled.

P.S. LSP-500VARC and LSP-1KVARC are the update version with big LCD screen. The LSP-500VARC-Pst and LSP-1KVARC-Pst are according to IEC TR 61547-1:2020 IEC61000-3-3, IEC 61000-4-15 and IEEE 1453 Pst programmable function as below:

Programmable AC Power Signal Output when do Flicker dynamic Pst LM(I) test in IEC TR 61547-1:2020