Specification: is a smart GPS Kids Phone with a student card in it just for students on campus. It is a combination of low cost cell phones and wireless Main functions 1.SOS alarm When this is pressed, a message will be sent to your cellphone so that many emergencies can be dealt with in time. 2.Recording studentsâ€™ attendances In this way, you can check your childrenâ€™s behavior at school and keep them in line all the time. 3.Stay invisible in class It allows them stay invisible in class without any disturbance from others. Weight 49g Dimensions 98.0ï¼ˆLï¼‰Ã— 55.0ï¼ˆWï¼‰Ã— 7.8ï¼ˆHï¼‰mm Operating temperature -20â„ƒ- 80â„ƒ Operating humidity 5% - 95% LED indicator Three LED indicators: GPS- Blue; GSM- Green; Power- Red Keypad 1ã€2ã€3 phone numbers; SOS button Key for emergency call SOS GSM 850/ 1900 or 900 / 1800 MHz GPRS Class12, TCP/ IP built-in GSM Module GPS MT3336 GPS Channels 22 Tracking sensitivity -165dBm Acquisition sensitivity -148dBm Locating time cost Hot start: <2 secï¼ˆopen skyï¼‰ Warm start: <15 sec Cold start: <38 secï¼ˆopen skyï¼‰ Antenna Built-in GSM quad band antenna, GPS high gain antenna Battery 3.7VDC/600mAh Standby time 96hours Call time 4hours Warranty 1. All products have been strictly Quality Checked in house before packing. 2. All products have been well packed before shipping. 3. One year warranty is provided for all models. We will bear maintenance cost during warranty.