supply of engineering itemengineering item,supplying, installation and commissioning of gps base tracking devices with pre-installed co mpatible sim with 3 (three) years warranty for monitoring of track patrolling along with mapping, customiz ation in software, software installation, android app, report generation and related assistance as per railw ay board letter no. 2017/track-1/29/8 dated. 16.01.2018 all liabilities including any recurring charges per device. rental charges, voice charges, sms charges, web charges, data charges and others if any for pre-in stalled sim per device up to a period of 3 years from the date of commissioning are including. replacement cost of each not working/defective devices as and when required among supplied gps tracking device of 3 years period from date of commissioning are including. iv. other any unforeseen cost such as repairing of d efective gps trackers or other emergent charges (if any) for 3 years from date of commissioning. gps devi ce should be supported with 4g network. 2) bidder must provide details of a technical person for repair, ma intenance and monitoring of the supplied devices. the technical person must attend software related comp lain within 24 hrs of reporting and repair the device physically within 3 days of reporting. [ warranty perio d: 36 months after the date of delivery ] ]