You are considered a construct. You do not require food, drink, air, or sleep to survive, and are immune to poison and disease. However, you can eat if you'd like.

 Whenever you are reduced to 0 hit points, you deactivate and fall unconscious. You are stable in this state but must receive maintenance to regain consciousness. Healing spells can be used to jump-start your system and cause you to regain consciousness, but you take one level of exhaustion until repaired, which can be done over a short or long rest. Alternatively, a creature may make a DC 14 tinker's tools check or a slight of hand check to repair you throughout a short rest. If successful, you gain 1 hit point and regain consciousness. Constructs have an advantage on this check.

Your AC is equal to 13 + your Constitution modifier. You cannot wear armor unless it is specially fit for your suit. It costs 25% more to make armor that can fit the suit and will take 1 day. Donning and doffing armor now takes 15 extra minutes, as they must be unscrewed from your body.

You gain proficiency in Performance and Intimidation.

You can see in dim light within 120 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

Add 2 points to either intelligence, wisdom or charisma.

A robot, unless for some ungodly reason ordered otherwise or forced, will never enter water. Entering water results in rolling at a disadvantage on all rolls, and after three turns, death. If the robot manages to revive themself, they will get three more turns to escape.

Robots have a high heat tolerance, and their relative lack of emotion makes spells that play with emotions and desires ineffective. You are resistant to fire damage, and immune to being charmed.

You may speak common, as well as one other language decided between you and the dm.

You have a battery which you must charge. The battery can last 4 days, after the week you go into "energy saving mode." Every day you do not stop to charge, you gain a level of exhaustion. At 6 levels, you power down until you are charged to full. Charging to full takes the duration of a long rest, half a charge is equivalent to a short rest. You charge via sun, or any other means you can convince your dm.

You have a second pair of arms, most actions are cut in half. You may do 2 actions per turn instead of 1, so long as the action is not casting a spell. If an action takes longer then 1 turn, cut the action time in half.

You need to be quite large to deal with your everyday life. You are medium to large.