Built-in solar panel with rechargeable battery, 4G cellular connection works without Wi-Fi. Dual-lens design delivers 4MP ultra HD clear real-time monitoring day and night for wider coverage.Supports local TF card video recording and cloud storage backup. You can save surveillance footage locally or upload to cloud for convenient video playback anytime.Built-in microphone and speaker enable two-way audio talk. Control all camera functions, watch live stream and playback recorded videos remotely via dedicated mobile APP.