The DJI Spark Remote Controller features Wi-Fi signal transmission system, capable of controlling your Spark aircraft and gimbal camera. The maximum range of the transmission signal is 1.2 miles. The Spark Remote Controller can connect to your mobile device wirelessly and display a live video feed via DJI GO 4 app. Its folding clamps allow you to attach your mobile device securely. Maximum remote controller battery life is approximately 2.5 hours.