1. Size: 16x10.2CM 2. Power: by USB line or 4 AAA batteries. 3. Function: it is programmable message by bluetooth. Just connect bluetooth by your cellphone. Apple or Android both ok. 4. How to use? step 1: By scanning two size codes only. Then you can download the software. Step 2: Turn on the bluetooth of your mobile phone and switch the fan. 5. Item include: 1 pc led fan + 1 pc USB line 7. The software support 4 languages: Chinese. japan English. Korea 8. Which we programma languege by cellphone? ------- Any language other than Thai can be support. 6. Clear pic I took from our factory. it just took by my cell phone without PS. real pics There are 3 pics for the software below. it's really easy to edit the message.