Guess it depends what your goals are. Nerdminers work for that but their hashrate is akin to a CPU on a laptop. Low power use, but chance of ever hitting a block next to zero, nor capable of being worthwhile pool mining. They would be handy for testnet mining though.

Bitaxes are a little more worthwhile. Still very low chance of ever hitting a block, but at least they are ASIC's.

Either could be used if you're exploring the mechanics of running a mining pool and need something to point at it.

Both work with WiFi.

Not sure how low power you want as you mentioned voltage, not wattage. You can get S9's modified to run on household 120v, but they will pull almost 1.5 kilowatts, and usually don't make sense unless you're using them as a heat source. They do make excellent space heaters though. They don't natively have wifi but bridge adapters do exist.