SJCAM has recently added a new 4K sports action camera to its line-up, the SJ5000X. This ultra-compact camera has a 12MP Sony CMOS sensor, a 170-degree ultra wide-angle lens, a 2.0-inch LCD screen, a microSD card slot (up to 64GB), a micro-USB port, a micro-HDMI output port and built-in WiFi connectivity for remote monitoring & control.
Other highlights include built-in gyroscope sensor for anti-shake digital image stabilization, Loop Recording and Motion-Activated Recording. Powered by a removable 900mAh battery, the SJ5000X can capture both UHD 4K @ 24fps, 2.5K @ 30fps, 1080p @ 60fps or 720p @ 120fps video and up to 12MP still images.
The SJCAM SJ5000X is available now for $129 (waterproof case + an assortment of mounts included). [Product Page]