Sandbox project a bid broadcast channel in Thailand , You can see our GPS watch in the video Y6S

4G Solar GPS tracker for Canoe rental monitoring

All our 4G GPS watch are available intercom chatting anytime, free video call anytime anywhere with phone app we are still coding 4G GPS watch support free video call with our PC server end ,not only between watch and phone app,this is good for school , nursing caring , fireman, all the industry workers, the truck drivers, Prisoners executed outside prison......wildly use for monitoring centers We are still coding 4G GPS watch support free video call with our PC server end ,not only between watch and phone app,this is good for school , nursing caring , fireman, all the industry workers, the truck drivers, Prisoners executed outside prison......widely use for monitoring centers

Does GPS Watch need a phone line?No. GPS Watch works as a mobile phone, completely independent of the telephone line. There is no need to carry a mobile phone.it's more than a phone.How does the SOS function work?If necessary, the user presses the side button of the GPS for 3seconds. GPS sets up a h

Why gps tracker need sim card?--GPS device is Feature phone system , just without the keyboard . It's available for international real time and real Googlemap tracking if the sim is available for international roaming. GPS work with smart phone app is phone to phone.