This scaling solution lets you send crypto instantly and for free between Grid+’s Lattice1 hardware or SafeCards. Security is ensured by the hardware’s physically unclonable chips (PUFs) and you only pay TX fees when you want to batch settle your received payments on chain. It doesn’t require and hubs or intermediaries. At launch it will work with Ethereum, Ethereum tokens, and Bitcoin but it’s a blockchain-agnostic solution and they will continue to add support for other blockchains as well.
This blog post is very in-depth but if you would like to check out the tech spec itself visit https://phonon.network/ .