We are excited to announce the NEW Cypher Labs Theorem 720 DAC and Headphone Amp. The Theorem is a 24/192 USB DAC for Apple devices, Android and Computers. You can order yours here at TTVJAudio! Order now and it will ship to you in about 1 week! This fully functioning DAC and headphone amp will work with single ended or balanced headphones. It works with Apple, Mac, PC and some Android products. Long battery life up to 18 hours on one charge. Read more about it on our website!