size : 230x87 characteristic · 64 keys · It is used for all sorts of terminal data imput in self-service. · It is compatible to WINDOWS98/ME/2000/XP · It is vandal proof and can be used in the open air and public place · It is abrasion-proof and can be cleaned by any kind of detergent and resolvable agent · PS/2 or USB jack is suppled by us. parameter Material: ·Front Panel: 304 stainless steel ·Key: 304 stainless steel ·Back: aluminum alloy Electrical Performance · voltage: 5.0VDC ±5% ·electric current: 10mA ·EMC Emission: EN55022(B) Mechanical Performance ·Operating Temperature: 0℃ to +45℃ ·Storage Temperature: -30℃ to +70℃ ·relative humidity： 30%～95% ·Life Expedance: >1 million times per key ·Stroke Travel: 2mm ·Actuation Force: 120g nominal ·Lettering: rasied key with high density printing ink ·Weight: 0.8kg Reliability ·MTBF >20000h ·MTTR Delivery: 10 days after getting the payment