Our company has been engaged in HiVi & HiFi product development and sales, We have high-definition video player, wireless sensors, DSD DAC, worthy of our proud product list is: HDX1000, BD1.and so on. Part of the DAC has been 5 years of experience, as the smart phone to cancel 3.5 headphone jack, so we focus on portable DAC, attached to the phone as a turntable. Whistle is our second-generation DAC products, the first generation is 'uPod', we will have a new product launch later, portable desktop DAC and so on.