If TECHCON's on-site service cannot be continued, and it's caused by client's computer or related device problem, the client also has to pay minimum HK$800 (2 hour) as the on-site service fee. The hardware provided by TECHCON (e.g. routers, hubs, network cables) is only available for use by TECHCON systems. Due to different reasons in the actual installation location during installation (for example: the size of the installation site, the separation of materials such as pillars or metal, different floors, different location units, hardware or hardware setting has been changed by a third party, etc.) causing the signal to be unstable or not enough, client need to purchase additional hardware from TECHCON and repurchase hardware setup services.