supply of supply and maintenance of 400 nos 4g lte based gps tracking devices with charger along with sim card.supply and maintenance of 400 nos 4g lte based gps tracking devices with charger along with sim card.,supply and maintenance of 400 nos 4g lte based gps tracking devices with charger along wit h sim card, recharge and data tracking, mapping in various sse/p.way units of eco.railway/ waltair divis ion (during day hours), report generation etc. for a period of 36 months as per railway board guidelines vid e rly board letter no ; 2017/track-i/29/8, dt. 16.01.2018 along with engagement of service engineer at divl . controller office/waltair/visakhapatnam/e. co. railway for monitoring of devices, submission of daily e xception reports to railway officials, attending rectification of malfunctioned devices for uninterrupted worki ng etc. during the currency of the contract. [ warranty period: 36 months after the date of delivery ] ] , supply and maintenance of 400 nos 4g lte based gps tracking devices with charger along wit h sim card, recharge and data tracking, mapping in various sse/p.way units of eco.railway/ waltair divis ion (during day hours), report generation etc. for a period of 36 months as per railway board guidelines vid e rly board letter no ; 2017/track-i/29/8, dt. 16.01.2018 along with engagement of service engineer at divl . controller office/waltair/visakhapatnam/e. co. railway for monitoring of devices, submission of daily e xception reports to railway officials, attending rectification of malfunctioned devices for uninterrupted worki ng etc. during the currency of the contract. [ warranty period: 36 months after the date of delivery ] ] , supply and maintenance of 400 nos 4g lte based gps tracking devices with charger along wit h sim card, recharge and data tracking, mapping in various sse/p.way units of eco.railway/ waltair divis ion (during day hours), report generation etc. for a period of 36 months as per railway board guidelines vid e rly board letter no ; 2017/track-i/29/8, dt. 16.01.2018 along with engagement of service engineer at divl . controller office/waltair/visakhapatnam/e. co. railway for monitoring of devices, submission of daily e xception reports to railway officials, attending rectification of malfunctioned devices for uninterrupted worki ng etc. during the currency of the contract. [ warranty period: 36 months after the date of delivery ] ] , supply and maintenance of 400 nos 4g lte based gps tracking devices with charger along wit h sim card, recharge and data tracking, mapping in various sse/p.way units of eco.railway/ waltair divis ion (during day hours), report generation etc. for a period of 36 months as per railway board guidelines vid e rly board letter no ; 2017/track-i/29/8, dt. 16.01.2018 along with engagement of service engineer at divl . controller office/waltair/visakhapatnam/e. co. railway for monitoring of devices, submission of daily e xception reports to railway officials, attending rectification of malfunctioned devices for uninterrupted worki ng etc. during the currency of the contract. [ warranty period: 36 months after the date of delivery ] ] , supply and maintenance of 400 nos 4g lte based gps tracking devices with charger along wit h sim card, recharge and data tracking, mapping in various sse/p.way units of eco.railway/ waltair divis ion (during day hours), report generation etc. for a period of 36 months as per railway board guidelines vid e rly board letter no ; 2017/track-i/29/8, dt. 16.01.2018 along with engagement of service engineer at divl . controller office/waltair/visakhapatnam/e. co. railway for monitoring of devices, submission of daily e xception reports to railway officials, attending rectification of malfunctioned devices for uninterrupted worki ng etc. during the currency of the contract. [ warranty period: 36 months after the date of delivery ] ]