Feature 1. New portable ni Callamte fans; 2. Only Android cellphone support OTG function can work for this new Fans; 3. Multi colors can be chosen; 4. Unique bendable design, also has light weight; 5. Low Noise with low power consumption Specifications Material: Plastic Net weight: 15g Dimension for Fans: 42mm x 88mm (L x H) Dimension for cro male jack: 6mm Working voltage: 5V Compatible model: mobile ; Android cellphone (Mobile phone must support OTG function) ; tablet PC; laptop; computer & more devices.