Ultra Slim Portable Audio Amplifier and USB DAC for your smart phone Ultra Slim Portable Audio Amplifier and USB DAC (Digital to Analog Converter) for your smart phone, presenting new listening experience Richer and Wider Palette of Sounds in Your Pocket Battery powered DAC / amp 8 hours battery life: 1750mAh Power ON/OFF auto detection Sabre ES9018K2M 32bit DAC for 100% native decoding of PCM and DSD / DXD PCM : up to 32bit / 384KHz PCM DSD : Native DSD DSD over PCM(DoP) DSD64 (2.8224MHz), DSD128 (5.6448MHz) DXD(24Bit/352.8KHz) Sample rates : 44.1KHz, 48KHz, 88.2KHz,96KHz, 176.4KHz,192KHz, 358.2KHz, 384KHz Outputs: 3.5mm Earphone Out Output level: 1.9Vrms(No Load) Output impedance: 1.2ohm S/N Ratio: 113dB @ 1kHz Cross Talk: 124dB @ 1kHz THD+N: 0.008% @ 1kHz Compatible with IOS and Android OS Controllable by iPhone and other Smartphone applications Mastering Quality Sound (MQS) Headphone Amplifier Ultra Slim High Definition & High-Resolution USB DAC This Portable Smart-Fi USB DAC & Amplifier is designed to present brand new experience of music listening directly from your smartphone, converting digital audio signal into the High-Res Smart-Fi analog sound. This will allow you to get the professional MQS sound by simple connection of Opus#11 directly to your device, serving as a medium and portable amplifier, to present the highest quality studio sound wherever you go. Mastering Quality Sound (MQS) Headphone Amplifier Ultra Slim High Definition & High-Resolution USB DAC Opus#11 is probably one of the best possible solutions for your High-Res audio experience you may ever find at the market. Super Ultra slim 7.9mm metal body comprises the high-end technology in the DAC area. The Bit has come up with a revolutionizing remedy to bring the unheard before sound to your daily life, whether you are commuting to work or enjoy your favorite music at home, in order to make MQS accessible to the masses. The XS1-U8A-64 (XMOS) has Eight-Core Multicore Microcontroller with Advanced Multi-Core RISC Architecture. This highest 32bit processor core is designed to provide powerful performance while you go. The Sabre ES9018K2M delivers an unprecedented level of performance and spectacular sound quality up to 110dB dynamic range and 0.008% of total harmonic distortion Opus#11 presents an ideal solution for stereo conversion from digital audio input in DSD formats of up to 32bit/384kHz. General specifications Body Material[Design] Aluminium[Slim] 7.9T Dimensons[mm) [T.B.D] 56*103*7.9T Weight 80g [T.B.D] Battery Capacity 1,750mAh / 3.7V[T.B.D] Playing Time 8Hr[T/B/D] CPU XS1-U8A-64 (XMOS) DAC Sabre32 ES9018K2M (32bit DAC) OUTPUT IMPEDENCE[T.B.D] 1.2 ohm OUTPUT LEVEL[T.B.D] 1.9Vrms(No Load) S/N Ratio[T.B.D] 113dB @ 1kHz CROSS TALK[T.B.D] 124dB @ 1KHz THD+N[T.B.D] 0.008% @ 1kHz, FREQUENCY RESPONSE 20Hz~20KHz (0.03dB) USB Input Interface USB AUDIO 2.0 / 1.0 , asyncchronous Supported Audio Formats (T.B.D) PCM : up to 32bit / 384KHz PCM DSD : Native DSD DSD over PCM(DoP) DSD64 (2.8224MHz), DSD128 (5.6448MHz) DXD(24Bit/352.8KHz) Sample rate : 44.1KHz, 48KHz, 88.2KHz,96KHz, 176.4KHz, 192KHz, 358.2KHz, 384KHz I/O USB 2.0 IN (MICRO 5PIN) DC JACK-IN (5V/1.2A) EARPHONE-OUT (3.5pie) LED INDICATE LED1: CHARGE LED LED2: BATTERY LEVEL / USB CONNECTION Supported O/S [t.b.d] Windows XP/Vista/ 7/8.1, Mac OS x10.6.4 or later, Android(4.4 or above), iOS7/8/9 Accessory (Package) T.B.D Phone Battery was draining fast Started the phone Started the OPUS by plugging in headphone...then connected both after both turned on. Seems to have fixed that issue.