Sparks remote controller features a brand new Wi-Fi signal transmission system, capable of controlling the aircraft and gimbal camera at a maximum transmission range of 1.2 mi (2 km). The remote controller can connect to a mobile device wirelessly and display a live video feed via DJI GO 4. Its folding clamps allow you to attach your mobile device securely. Maximum remote controller battery life is approximately 2.5 hours. Video transmission range of up to 1.2 mi (2 km). Max speed of up to 31 mph (50 kph) in Sport mode. Suitable for indoor and outdoor use. Controlled using smartphone and remote. Batteries required: 1 x . This item is not a toy. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. To be used under the direct supervision of an adult. General information: Size H5, W11, D7.4cm. Weight 138g.