OBiDi - 2-in1Mini Micro USB mobile phone fan portable for PC tablets power bank android smartphones Portable, flexible, quiet; fit for both USB and mciro port Easy to take. Low noiseness Silicone material, enviromental. size:43x30x89.3mm Please notice this MINI Fan only work for the phone with micro usb and support OTG, or you could put it directly to the USB Port to make it working.