We make tools for the world after the grid.
3T3R Engineering is the hardware house of 3T3R. We design and build computers that don't need permission — no carrier, no cloud, no account. RA4DIO is the field body.
We started 3T3R Engineering because every device in our pockets had become a lease. A SIM you rent. A tower you don't own. A cloud that decides what you can say and when. We wanted a computer that owed nothing to that arrangement.
RA4DIO is the first body we designed against that arrangement. It speaks directly — device to device, on license-free spectrum, end-to-end encrypted. It carries a small private AI so you can still think out loud when the internet goes dark.
We are a team of hardware and radio engineers. We work quietly, ship slowly, and publish honest field data before we ask anyone to pay full price. If you want to talk to us, write to engineering@3t3r.com.