1. Lightweight and portable. Only 9G weight2. Master level sound quality. The sound quality will increase by about 25%-45% (depending on the phone)3. Strong thrust. Built-in 130mW thrust, higher than the phone's 25mW, compatible with 99% of mobile phones4. professional grade AKM4452 DAC decoder chip. Supports 24Bit / 192KHz code rate. Easy to use, no need to charge, plug in the phone and use it right 5. Split design. Partial integrated decoder, Q1 amp does not exist, the connection line is broken, you need to change the whole amp (change the connection line can continue to use) Exquisite appearance.Q&AQ: Can I use a microphone when the Q1 amp is in use?A: No.Q: When is broken or damaged, do to buy the amp again?A: No, just change and buy a new one again.Q: I have different types of mobile phones, can I use ?A: Yes, you only need one amp, then select the line and you can use it on different types of mobile phones.Built-in Battery: NoRecommended Headphone Maximum Impedance: 151-200 OhmOutput Type: LINE OUT (AUDIO OUT)Input Type: Type-CDSD (Direct Digital): YesBody : AluminumChannels: 5 (4.1)Output Power: 130mW/16ohmModel Number: Q1Operational Amplifier Chips Model: Max37220Signal To Noise : 115dbPCM: YesBluetooth: NoDAC Model:9108K2MType: Mini AmplifierWIFI: Noother use way: use with PC as DAC sound cardcolour:Black:Aluminum size:49 x 17.5 x 7mmPackage Contents:1 x Q1 HIFI Earphone AmplifierOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.