The term "mech mod" is short for "mechanical mod". And "mod" is a term for a more advanced type of vaporizer device. Mech mods are not power regulated. There is no chipset and there are no wires. It is purely mechanical, which means that every time you have a vape your battery gets weaker and weaker with each puff. You have to know when to change your battery based on how low your battery voltage has dropped. If you are unsure about mech mods, check out some youtube reviews first.