Portable Mini GPS GSM/GPRS Car Tracking Locator Device with Sound Recording Function for Loss Prevention and Tracking Usage: Whether placed in a vehicle, children's backpacks, elderly pockets, or valuable bags, you can send SMS commands to monitor the locator's location in real time, making it easy to keep track of your target. Product features: Remote operation: Control the locator via SMS to start or stop recording, positioning, and other functions. Remote location query and online tracking: Allows for remote checking of the current target location and live tracking. Expandable TF card: Supports TF card expansion and remote memory clearing. Remote status inquiry: You can remotely check if all functions are active, battery status, binding number, signal strength, start frequency, GPRS, and TF card capacity. Remote recording: Enables remote recording capabilities. Voice-activated callback: This feature activates remotely, allowing the locator to call a preset number when surrounding noise exceeds 40dB. One-way call: Dialing the locator number allows you to hear surrounding sounds without any noise or light emitted from the device during the call. Specifications: Product: Locator Device Color: Black Material: Engineering Plastic Battery Capacity: 3.7 V 400 mAh Li-ion Standby Time: 12 days Working Time: 4 to 6 days Talk Time: 150-180 minutes Format: GSM/GPRS GPRS Upload: 60, TCP/IP GSM Positioning Time: 25 seconds Other parameters: Talking Current: 150 mA Standby Current: 2.5 mA Operating Voltage: 3.4-4.2 V DC Open Voice Control Current: 30 mA