Device Link - https://www.esslsecurity.com/fingerprint/k30
Common SDK Link - https://www.esslsecurity.com/software
API Guide - http://182.76.161.219:81/iclock/WebAPIService.asmx
Application Link - http://182.76.161.219:81/iclock/
Username - essl 
Password - essl 
SDK for this device not found on https://www.esslsecurity.com/software