Features:000 # number # number # number # (binding three phone numbers)111 (SMS recording 10 minutes pause)222 (voice recording 5 minutes pause)333 (voice-activated dial-back telephone)444 (delete all contents of memory)555 (turn off all features)666 (vibration alarm SMS)777 (vibration alarm telephone)888 (play the memory recording --- such as the next play then pause after the broadcast --- if the switch key short press pause)999 ( SMS Coordinate Positioning )789 ( Upload 10seconds voice recorder to 365gps ftp server )123#1/0 ( Open/Close auto upload location data )Voice#1 / Voice#0 ( Sound Detection Auto Voice Recording Upload to FTP Server Listen in 365GPS APP, 1-open, 0-close)S3 : ZX303+400mah batteryS7: ZX303+1000mah batterySpecification:Multiple Positioning Mode: GPS+ AGPS+LBS+WIFI + TF Card and APP Voice RecorderWorldwide GSM+GPRS 4-frequency System: 850/900/1800/1900MHzAutomatic Time Update: Precise GPS time service and no manual time adjustment is neededTrack: The user's specific location can be inquired through the cell phone APP or the computerFence: Designate an area on the map by setting the device as the center point and the alarm will be triggered off immediately once the user of the device goes into or out of this areaPlayBack: Inquire the moving routes of the device in the past 3 months anytime and anywhereSOS: In case of emergency, press the SOS button and the device will send out the call and message for help to the guardian (long press power button 4 seconds)Walk: Counts the steps the user has walkedReward: The reward is sent out through the APP on the guardian's cell phone and the reward progress can be viewedVoice: With the highly sensitive microphone, the sound around the device can be heard in real time in case the emergency happens to the userRemote Power-off: The device can be turned off through the APP on the guardian's cell phoneRemote Restart: The device can be restarted through the APP on the guardian's cell phoneIntelligent Power Saving: The device turns off/on the GPS and data upload in the time range specified through the APP on the guardian's cell phone.Map: Baidu map and Google map.Quantity:1 Set Note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package includes:(No Retail Packages)1 x GPS Tracker1 x Battery