BuyDig offers the Urge SoundBrick Plus NFC Bluetooth Stereo Speaker in Orange, Yellow, Blue, Black, and Red, model no. UG-SBPLUS, from $27.50 with free shipping. (Tanga charges $24.99 plus $2.99 for shipping.) That's the lowest total price we could find by $2. It features NFC pairing technology, two 3-watt speakers, up to eight hours of playback, and microphone.