VEVOR Electric Hoist, 1320 lbs Lifting Capacity, 1150W 110V Electric Steel Wire Winch with Wireless Remote Control, 40ft Single Cable Lifting Height & Pure Copper Motor, for Garage Warehouse Factory

If the batteries in the remote control are dead, you will not be able to use the machine and need to replace them with new batteries.

No, it isn't waterproof.

It can be used through a wall, but the range cannot be too far, and it is not very safe, because the trajectory of the machine cannot be seen clearly.

Do not buy this product that is a scam mine came and it never worked are you with them they said it would cost too much of the return and said he won't send me a return statement at one point they said they were refund my money they never done that and they've never sent me a new one and having a house done nothing to help me

The product description states its load capacity is 660 lbs on a single line and 1320 lbs on a double line, indicating it can lift heavier loads using the double line configuration.