ASIC devices are designated for cryptocurrency mining. They have a much better hashrate to the energy consumption rate and outperforms GPU devices in this regard.
The Bitmain Antminer L3+ (504Mh) was produced by Bitmain and released in 2017. This miner consumes 800W, producing 504.0 Mh/s of hashrate with the scrypt algorithm, which makes this device almost (if not at all) useless. We do not recommend buying this device for mining nowadays.