How would i change 220v to 110v? i set the 2 prong plug at the back of machine to 110v. what should i do at the front?

Since you plan to use your appliances (200V-240V) in the United States, please make sure to select 110V from the Input Voltage Selector on the back of the ROCKSTONE POWER Voltage Converter Transformer (The factory default setting is on 240V). Plug the power cord into the U.S. wall/power outlet and switch on the Voltage Converter Transformer without plugging in any appliances. The Power Source indicator red light will turn on. Then, plug your appliance's plug into the 220V output outlet located on the front panel (please use a plug adapter if needed) and switch on your appliance.

What is the output Hz?

so if I use a double ended bulb 1200w 90 hz it will work perfectly too ??

How to install fuses?

The fuse holder is on the back of the transformer (above the power cord), please loosen the screw with a screwdriver to replace the fuse if needed. (Package includes 2pcs spare fuses). Please make sure that the fuse and/or the fuse holder is tightened securely when replaced.

Can this work with 220Watts wet grinder purchased from India?

220 watts is probably the running current of the wet grinder... the start up current may be higher. I would try the 1000 watt unit. And you can exchange it if it has trouble with start up for the 2000 watt model which should have more than enough capacity.

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Rockstone Power 高耐久昇圧/降圧変圧器変換器 - 昇圧/降圧 110/120/220/240 V - 5V Usb ポート - Ce 認証取得済み 1000W

Rockstone Power 高耐久昇圧/降圧変圧器変換器 - 昇圧/降圧 110/120/220/240 V - 5V Usb ポート - Ce 認証取得済み 1000W

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Product ID: 764717955

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Details

Brand
Rockstone
Power Source
Corded
Specification Met
CE
Item Weight
5.9 kg
UPC
617529014595

⚡1000W heavy-duty power

🔌3 simultaneous output modes

🛡️Full overcurrent & fuse protection

Description

⚡ Power your world, anywhere — no compromises, just pure voltage mastery!

READY OUT OF THE BOX - Includes US-to-European plug adapter, extra fuses, and a 3-year warranty — no guesswork, just plug and play.
MILITARY GRADE RELIABILITY - Trusted by the US Army since 2001 — engineered for demanding environments and professional use.
BUILT TO LAST BUILT FOR SAFETY - Rugged metal housing with CE certification and complete fuse protection ensures durability and peace of mind.
POWER UP OR DOWN WITH CONFIDENCE - Seamlessly step voltage between 110-120V and 220-240V for global compatibility.
TRIPLE OUTPUT TRIPLE CONVENIENCE - Simultaneously power USB devices, US sockets, and universal sockets without swapping plugs.

The Rockstone Power 1000W Heavy Duty Boost/Buck Transformer is a CE-certified voltage converter designed for professional and home use. It supports stepping voltage up or down between 110-120V and 220-240V, with patented triple simultaneous outputs including a 5V USB port. Built with rugged metal housing, full fuse and overcurrent protection, and backed by a 3-year warranty, it’s trusted by the US Army and ideal for powering diverse electronics safely and reliably worldwide.

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Global Trade Identification Number	00617529014595
Manufacturer	E Depot Express
Batteries Included	No
Batteries Required	No
Item Model Number	1000 watt
Size	1000 Watt
Product Dimensions	29.21 x 25.4 x 20.96 cm; 5.9 kg

Rockstone Power 高耐久昇圧/降圧変圧器変換器 - 昇圧/降圧 110/120/220/240 V - 5V Usb ポート - Ce 認証取得済み 1000W

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Rockstone Power 高耐久 昇圧/降圧 変圧器 変換器 - 昇圧/降圧 110/120/220/240 V - 5V Usb ポート - Ce 認証 取得済み 1000W

Details

Description

Specifications

Have a Question? See What Others Asked

Common Questions

Rockstone Power 高耐久昇圧/降圧変圧器変換器 - 昇圧/降圧 110/120/220/240 V - 5V Usb ポート - Ce 認証取得済み 1000W