Guard Tour System is with auto-reader mode design 4M Flash memory: data storage recorded the largest number of 30,000 (GS-5000A) Guard Tour System with auto-reader mode design I. Product Production:1. GS-5000A Guard Patrol Probe, without the use of keys, auto-reader mode design.2. Equipped with sound, Led lighting, vibration triple success prompted reader, convenient and practical in any ...