We have shipped most preorder batch HM-602. HM-602 Preorder will be finished on Monday, Nov 1st. From now on, we will not provide free RE262 IEM with HM602. It is well known that Non-oversampling dacs offer great sound for little money. HM-602 is the first portable player using non-oversampling DAC: Philips TDA-1543. As younger brother of HM-801, HM-602 shares HM-801's great sound signature. To make it as portable as possible, HM-602 does not have amplifier modular design. However, its headphone amp part is very similar to HM-801's standard module. To drive both high impedance and low impedance headphones, HM-602 with the high / low Gain switch can drive both high efficiency IEM and most full size headphones. In addition, HM-602 also can work as a USB DAC. Firmware and music format support: Same to HM-801 D/A Chip: TDA1543 LPF Op-amp: OP275, OPA2604 Headphone Amplifier Op-amp: OPA2107 Freqency Response: 20-20K Hz Distortion: 0.09% S/N: 92 DB Stereo crosstalk：74 DB (Lineout) Headphone Amplifier Output level: 1.1v at 32 Ohm; 2.2v at 150 Ohm Max Output: 30mw at 32 Ohm; 26mw at 150 Ohm Size: 62mm*103mm*26.5mm or 2.4 * 4.05 * 1.04 Inch Weight: About 200g / 7Oz On board Flash: 16GB Battery time: 9 to 10 Hrs I / O: Headphone Output; Line Output; USB Data Exchange; USB DAC Input; SD card (up to 32GB) Note: TDA1543 DAC chips are tested used chips because TDA1543 was discountinued many years ago so that it is almost impossible to find new chips. We promise that all chips were tested. We promise that we will run-in HM-602 players for more than 24 hours before ship them out. Waranty: 30 days refund. 90 days free replacement and 1 year repair.