This model claims to record in 4k at 24fps**.
There's also a Pro version that mainly differs by the addition of a remote and a different sensor (IMX117).
** a notice on the Pro version page specifies:
Video resolution: 4K 24fps (4K is the effect achieved by chip and sensor software optimization, physical hardware resolution is 2880 x 2160P)This is not mentioned for the Elite 4K but since it has a cheaper (but nevertheless very good) IMX078 sensor paired with the same NTK96660 chipset, I don't see how it could ever be a true 4K (real 4K cameras currently cost much more). Instead this camera should rather be considered as a 1080FHD@60fps, which is still very good for the current price (69.99$ / 63.69€)
Main Features:
Upgraded Chipset NTK96660 chipset recording 4K video at 24fps
App control via WiFi: Explorer Elite app
Underwater Mode Fill-in Light
Built-in Gyro for image stabilization
Waterproof Case (up to 30m depth)
Max External Card Supported: TF 64G (not included)
Screen: 2" TFT 960 x 240
Battery Capacity: 1050mAh
Power Supply: 5V 1A
Charge by AC adapter or USB
Working Time: 75mins (1080P)
Wide Angle: 170 degree wide angle
Video Resolutions: 1080P@30fps & 60fps,2K@30fps,4K (3840 x 2160),720P (120fps)
Video Output : HDMI
WiFi Function: Image Transmission,Remote Control
Interface Type: Micro USB,TV-Out,USB 2.0
Language: English,French,German,Italian,Portuguese,Russian,Simplified Chinese,Spanish
Product weight: 0.055 kg
Product size (L x W x H): 5.92 x 4.10 x 2.98 cm / 2.33 x 1.61 x 1.17 inches
Package Contents: 1 x Action Camera, 1 x Waterproof Cover, 1 x Adhesive Tape, 1 x Cleaning Cloth, 1 x Bandage, 1 x Bicycle Stand, 1 x Accessory Seat (1), 1 x Accessory Seat (2), 1 x Steel Rope, 1 x Ribbon, 1 x Fixing Base, 1 x USB Data Cable, 1 x Helmet Seat, 1 x Adapter, 1 x Adapter Stand(1), 1 x Adapter (2), 1 x Adapter Stand (3), 1 x English User Manual
I recommend to watch this terrific video review from Bob Moore.