The best-selling FiiO E11 now in Bundle with the FiiO L9. Our customer asked for it here is it: Fiio E11 + L9 in one. FiiO E11:Welcome to the newest member of the growing FiiO amplifier family. Never ending innovation from Fiio has brought us the Fiio E11, the latest and perhaps most mature amplifier from Fiio yet. With the E11 FiiO is stretching once more the edges of headphone amplification. Another first in including a replaceable Nokia-style Lithium Ion battery. The dimension of the amp is small and compact, with a high build quality plastic enclosure giving a very solid and lightweight packaging for the amplifier circuitry. Just have a look at the specs: Power Source (Adapter)DC 5V, 500mAFrequency Response 10~100KHzSignal to Noise Ratio 98dBCrosstalk 60dBGain? 12dB(High); 6dB(Low)Total Harmonic Distortion 0.009%(10mW)Maximum Output Power Voltage=H 300mW(16??)Voltage=L 120mW(16??)Battery charge time 200MBattery play hours:>10HRecommended Headphone Impedance ?16~300??Input Impedance>5K??Size 92.5x 54.2x 13.4mmWeight 65g (battery included)FiiO L9:Designed with a dock connector, insert iPod/iPhone and lineout to 3.5 stereo plug. Use to connect portable audio equipment, such as power amplifier, headphone amplifier. High-quality materials made in OYAIDE Japan, L9: a new way to save space, easy to carry.