SenTech, Security Camera, models:

STC-1100C	Operating Manual
STC-400 Series	Operating Manual
STC-A33A	User Manual
STC-CL500E	User Manual
STC-GE33OX	User Manual
STC-GE83A	User Manual
STC-SBS231POE	Product Specifications And User'S Manual
STC-TB83USB-ASH	Instruction Manual