Supplied updated to the latest firmware and in the original box. Also supplied with a new iFi GO blue leather (Opened box) case. Please see my feedback I have sold several iFi products in the past. About this itemEASY BLUETOOTH CONNECTIVITY - The latest Qualcomm 5100 series Bluetooth (only input) DAC supports Bluetooth 5.1 in all current and future formats such as AAC, aptX, aptX HD, LDAC, HWA Codec. Easily stream your favourite music in CD quality to your system from your smart phone, laptop, DAP, or any device that transmits Bluetooth. Control your music with your favourite music app, sit back and relax.HIGH RESOLUTION AUDIO - With CD quality aptX HD AAC Bluetooth up to 24 bits / 192 kbps you will experience higher quality audio than standard Bluetooth Without the drop in quality your music will have better definition and clarity.BALANCED & S-BALANCED - The S-Balanced circuitry cuts distortion by 50% with single ended headphone connections.HIGH QUALITY COMPONENTS - Separate Bluetooth, DAC, and AMP stages, individually optimised for maximum performance.BUILT IN MIC - The GO blu features a high-quality microphone for hands-free calls on the go

What is includedGO Pod earpiecesCharging caseUSB-C cableMMCX earhooksPentaconn earhooks2-pin 0.78mm earhooks NOTE> buy the MEZE Advar IEM here http://www.ebay.co.uk/itm/195787194461 FEATURESBluetooth version: Bluetooth 5.2Bluetooth codecs: AAC, LDAC, LHDC, aptX HDDAC Chip: Cirrus Logic CS43131Amplifier: 16-ohm output impedanceFrequency response: 20Hz to 40kHzTotal Harmonic Distortion (THD): < 0.005% (1 kHz, 10 mW)Signal-to-Noise Ratio (SNR): > 118dBBattery life: Up to 6 hours per earpieceCharging time: Approximately 1.5 hoursQuick charge support: 10 minutes for 1 hour of playbackCharging case capacity: Holds 15 hours of extra chargeCharging case dimensions: 11cm (L) x 7.5cm (D) x 4cm (H)Charging case weight: 145 grams (empty)Wireless charging: Qi wireless charging compatibleEarhook adapters included: MMCX, Pentaconn, 2-pin 0.78mmEarhook material: Rubber plastic semi-rigid with flexTouch controls: Six tap gestures for audio playback, voice assistant, and callsBuilt-in microphones: Yes, for callsLED lights: Battery and Bluetooth status indicatorsCase material: Plastic with magnetically secure hingeCase interior: Suedette fabric lining and magnetized earpiece holdersCase illumination: Two white LED lights that turn off after 30 secondsCompatibility: Works with most IEM connectionsWeight: Each earpiece weighs 8 grams, earhooks weigh 2 grams

iFi GO blu – Portable Bluetooth 5.1 Headphone Ampl 4.4mm & 3.5mm Socket. Used. Boxed and in excellent condition. USB Type-C cable included is not the original.