Features: Real-time Positioning: Via SMS, mobile app, WeChat, computer web to achieve a variety of functions. SOS Help: Press and hold the SOS button to call the bound number for help. Two-way Audio: The device calls the mobile phone to enable two-way audio communication. Voice Call: Activate this function; when the ambient sound exceeds 60 decibels, the device will automatically call the bound mobile phone for help. HD Street View: You can see the street view around the location. Description: Item Type: Car GSM/GPRS/GPS Tracker Model: TX-9A GPS Type: GPS Tracker Size: 43*37*13mm Voltage: 3.7V-4.2V GSM Chip: MTK6261 Material: Plastic Package: Yes Package Size: 120*108*35mm Specifications: Color: Black Working Current: 5VDC standard mode 50mAh, 5VDC power saving mode 15mAh Frequency Quad-band: 850/900/1800/1900MHz Receiver Channels: 12 parallel channels Positioning Accuracy: 5m (95%) Position Accuracy: 50m (60%), 150m (95%) Output Interface: Charging/Digital Port GSM Antenna: Built-in GPS Antenna: Built-in Working Temperature: -30℃ to +85℃ Working Humidity: 5%-95% Storage Temperature: -40℃ to +85℃ Package Contents: 1 x GPS Tracker 1 x Cable 1 x Box 1 x User Manual Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.