Damson Audio Jet Portable Wireless Bluetooth Stereo Speaker Pair - Black WIRELESS CONNECTIVITY - Bluetooth 4.0 and APT-X with NFC make the Jet the ultimate wireless bluetooth speakers. The Jet can be used with almost all of today's modern devices. Bluetooth 4.0 means you can stream music from your phone while hardly draining your battery. Built in microphone means you can make and receive calls too INCISOR DIFFUSION - Where the old-fashioned coil would vibrate the card or paper cone to generate the sound internally, the incisors are firmly attached to tactile silicon feet, which transfer the full sound down into the surface they are placed on. The sound then radiates out through that surface. Thus the better the resonance of that surface, the better the sound! The bigger the surface  the bigger the sound WIRELESS STEREO - This is the world's first true wireless stereo speaker system with a right and left channel. The two speakers can be placed up to 30 feet apart and will communicate with each other to deliver in-sync stereo audio POWER - Measuring in at at 8 cm (4") tall, with a diameter of 5.8 cm (2.5") they produce an awesome 20 watts of power per speaker, that's right - per speaker. Do not be fooled by the palm-sized speaker set, they delivery amazingly rich room filling sound, loud enough to fill even pretty large rooms! PORTABILITY - A small size combined with up to 8 hours of playback from the rechargeable battery means you can use these all over. Connect multiple Jet speakers together and spread the sound all over! Wirelessly