0-99Hz mini & light weight digital frequency signal indicator
Size: (length) 51mm x (φ)29mm/2"x1.14"; Install opening: (φ)22mm/0.9"
Built-in screws for wiring, safe and convenient in usage, durable and firm
Power supply: AC 24-500V; Working temperature: -25℃~+65℃
Great for electricity, other equipment signal indicating and frequency displaying