The main features quad-band GSM + GPS global positioning web platform / Apple / Android / micro-channel / SMS inquiry location information track playback electronic fence the SOS button dialing a two-way voice speakerphone loudspeaker mute replaced for low battery alert prompt care products brand: sharp peaks Wise Model: RF-V16 GSM frequency bands: GSM Quadband + GPS global positioning Standby time: 12 days speakerphone Automatic answer: mute care: There are buttons to answer a call: There are built-in battery: Yes (card that is used) low Alarm: Alarm displaced: there is a remote pickup: There GSM bands: 850/900/1800 / 1900MHz GPRS standards: Class 12, TCP / IP GPS positioning time: Cold start 30sec (open sky) Warm start 29sec (open sky) Hot start 5sec (open sky) GPS positioning accuracy: 10-15 meters (open sky) Operating temperature: -20 ℃ ~ + 70 ℃ Operating Humidity: 5% ~ 95% RH Specifications: Dimensions: 40 * 30 * 14mm Packing size: 138 * 118 * 46mm Body weight: 27g Package weight: 218g Color: black / blue / pink