Raspberry Pi 3 RPi3 controller for Avalon 721 741 821 841 921 Bitcoin BTC miner

Description

Raspberry Pi 3 controller for Canaan Avalon models including (but not limited to) 721, 741, 821, 841, 921 and others. Please indicate in your purchase which model is needed; also, please provide mining pool preference and account name if you want the controller pre-configured. Appearance of controller (i.e., case model) maybe different than depicted. Controllers are tested for appropriate function prior to shipping.
Kit includes:
(1) RPi3 motherboard assembled in case
(2) Micro SD card with requested firmware pre-flashed