1. Vibration speaker is a magic audio frequency fixture. It is quite different from the traditional one which base on electro-magnetic coils. It makes any hard surface play euphonious musical notes, such as wood, glass, floor, metal surface, etc. You can hear various materials around you, which play different music quality in different sides, and you will enjoy yourself in the freedom of music. The new sound principle will bring a new musical life style to you. 2. The size and shape of vibration can be originated freely as you like because of the advanced technology. The audio quality maintains the same level no matter whether it is large or small. Vibration embodies fashion, imagination, interest and portability incisively and vividly. It exploits new times that high quality audio equipments are joining in the trend of fashion and portability. 3. Vibration speaker is not just an audio box, but it is a new stylistic product of audio frequency. It is very small and is used to furnish audio frequency for PC, Mobile phone, Mp3, Mp4, CD, palm players and other portable fixtures. This is a chic and portable 2.5W vibration mini speaker. Crafted from fine workmanship, the mini speaker is durable and lightweight to use. Simply press play on your device (iPods, MP3 players, mobile phones, laptops, etc.) and you can enjoy the music ? Features: Small and exquisite, the mini speaker is portable and lightweight Vibration design to this mini speaker Great to take the mini speaker with you whenever you may need it Provided with excellent sound quality Good choice for you ? Direction to usage: When you use Taking, please put it on hard surface upward, and let the pedestal touch the surface tightly. Specifications: Input: Mini USB Frequency: 100Hz-12 KHz Rated Output: 2.5W Sensitivity: 85db/m/w Impedance: 8?Hms+/-0.