The main features of the action camera 4K:
1. 4K Ultra HD sports camera
Professional 4K 30Fps video with 20MP photos at up to 30 frames per second for incredible photos, which is 4 times the resolution of traditional HD action cam.
2. Wireless wrist remote control waterproof action camera
With a wrist 2.4G remote, you can control the 4k camera, framing shots or recording video is convenient. (The remote is not waterproof)
3. Longer battery life
Underwater action camera comes with 2 rechargeable 1050mAh batteries. Each battery can record up to 90 minutes. No more worry about the recording time for this waterproof camera.
4. Built-in WiFi & HDMI, edit & share your photos in minutes
Just download the app (iSmart DV) on your phone or tablet and connect with the underwater camera. Wi-Fi signal ranges up to 10 meters.

5. 40M waterproof camera
The action camera 4k equipped with durable waterproof case. Your underwater adventures can reach 131 feet/40 meters.
Tips You Need Know:
1. Micro SD cards up to a capacity of 128GB are supported. The Micro SD card (Class 10, at least 8GB, UHS 3 card above) is recommended. The micro SD card is not included.
2. Please charge the battery for 2-3 hours, then it can be fulfilled 60-90 minutes video recording regarding different video resolutions. (Two batteries, a USB cable and the charger are included)
3. The external mic is unavailable when using the waterproof case, because the waterproof case is totally sealed.
4. The remote control is NOT waterproof, please don't take the remote underwater.
5. The sound effect will be influenced in the waterproof case. Please do not put it in the waterproof case for a better sound recording.
6. The dual-screen cannot be used at the same time. Please press and hold the "M" button for 3 seconds to switch between the front screen and the back screen.