Recently we received some feedback that some one is using mantern@yahoo.com to send emails to our clients to make some disturb. Please note this email is not our company email address. If you receive any email from this address. Please ignor. Our company is engaged in all kinds of gas detector, fire fighting, security and safety etc. business for our clients. Our correct email address is sales@mantern.com, sales@mantern-china.com or zzmantern@gmail.com. Thanks for your attention!