... (with metal frame) 2, excellent sensitivity Infrared touch easy screen size options TLS-V15,TLS-V17,TLS-V19, ... the product dust-free, water-proof, explosion proof. It is easy to make long distance delivery and the sizes can be ... informationWriting toolFinger or other opaque objects such as plain wipe-easy pen.Working principleInfrared technicalPositioning accuracy≤2mmCusor speed180 dot/sResolution4096(W ...