WARM TIP: The charging needs to be less than / , otherwise it will burn the product. Cold Shoe Extension There are 2 cold shoe mounts on both sides of the clamp for fill light or microphone. Height Adjustable Two-section bracket can be stretched at will from 185mm-305mm. The extendable bracket allow for more comfortable visual effect. Wide Compabilities The stable springback clamp is - (not for S Ultra series) adjustable clamp length,suitable for most cell phone models. iPhone, Samsung series, etc. Low Noise Working The phone cooler is equipped with a brushless silent motor, and the working sound is lower than standard value noise of 27d. It is easy to enjoy silent cooling. Fast Cooling It has gone through the 1-hour test in Ulanzi laboratory. After continuous use for 1 hour under the indoor temperature 26.4°C, the mobile phone with a cooling phone clip is 15°C lower than the one without cooling phone clip. Multi-layer Cooling There are 5 layers cooling devices. Air cooling plus ice magnetic, while the dual micro-channel is designed for heat dissipation. The composite structure design could provide efficient cooling within 3 seconds.