If you find this work useful in your own research, we would be grateful if you could cite the following paper which presents the armband in details:
@article{cote2019low, title={A low-cost, wireless, 3-D-printed custom armband for sEMG hand gesture recognition}, author={C{\^o}t{\'e}-Allard, Ulysse and Gagnon-Turcotte, Gabriel and Laviolette, Fran{\c{c}}ois and Gosselin, Benoit}, journal={Sensors}, volume={19}, number={12}, pages={2811}, year={2019}, publisher={MDPI} }
Continuation of this work can be followed here: https://sifilabs.com/.