Never worry about international voltage compatibility again. The ST Series Step Up & Down Voltage Converter Transformer allows you to seamlessly run electric equipment from different regions anywhere in the world. Designed for both home and commercial use, it converts 110V/120V electricity to 220V/240V, or steps down 220V/240V to 110V/120V with a quick flick of the rear selector switch.

Equipped with universal sockets, portable carrying handles, and multi-layer safety protections (fuse and thermal cutoff), the ST series is ideal for powering imported coffee machines, rice cookers, power tools, audio equipment, and air purifiers safely.

2-in-1 Bi-Directional Voltage Conversion: Easily switch between 110V→220V (Step-Up) and 220V→110V (Step-Down) via the rear input voltage selector.

Universal Output Sockets: Compatible with US, UK, EU, AU, and universal plug types without needing extra plug adapters.

100% Full Power & Silent Operation: Engineered with high-efficiency coils for low noise, low radiation, and stable output during continuous performance.

Comprehensive Circuit Protection: Features dual fuses (or resettable circuit breakers) for short-circuit, over-current, and surge protection to keep your valuable appliances safe.

Portable & Durable Casing: Flame-retardant metal housing with heat-dissipation vents and a sturdy top handle for convenient portability.

mportant Buying Guide for Customers:

For safety and longer service life, please choose a transformer with a rated capacity at least 2 to 3 times higher than your appliance's actual wattage rating:

Standard Appliances (Resistive Loads): For laptops, TV, lights, or heating pads, choose a transformer with 1.5x to 2x power margin.

Inductive / Motor-Driven Appliances: For coffee makers, refrigerators, power tools, hair dryers, and rice cookers (which have high starting surge currents), choose a transformer with 2.5x to 3x power margin.

Imported Kitchen Appliances: Espresso machines, rice cookers, blenders, stand mixers.

Personal Care & Home: Hair dryers, air purifiers, vacuum cleaners, heated toilet seats.

Entertainment & Tools: Audio amplifiers, gaming consoles, power tool battery chargers.

Q1: Can I use both the 110V and 220V output sockets at the same time?

A: Yes, as long as the total combined wattage of both connected appliances does not exceed the maximum power rating of the transformer.

Q2: Do I need to manually switch the voltage on the back before plugging it in?

A: YES! Always check the rear voltage switch before connecting to power. Set the switch to match your local wall socket voltage (e.g., set to 220V in Europe/China, or 110V in US/Japan).

Q3: What plug type comes on the power cord?

A: We supply region-specific input power cords (US Plug, EU Plug, UK Plug, AU Plug) based on your target shipping market or OEM requirements.

The weight and dimensions are for reference only, please refer to the actual situation.