eSynic Professional Headphone Amplifier Portable Headphone Volume Amplifier Rechargeble Headphone Amps Digital HiFi Amp With 3.5mm Jack & a Two-stage Gain Switch for MP3 MP4 Phones and Computers etc Style-A electronics_update_2023 what is the feature of

what is the feature of this material

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4cm) Material:plastic

The Y Spade Plug is perfect for any speaker wire connection

eSynic Professional Headphone Amplifier Portable Headphone Volume Amplifier Rechargeble Headphone Amps Digital HiFi Amp With 3.5mm Jack & a Two-stage Gain Switch for MP3 MP4 Phones and Computers etc Style-A electronics_update_2023 what is the feature ofeSynic Professional Headphone Amplifier Portable Headphone Volume Amplifier Rechargeble Headphone Amps Digital HiFi Amp With 3. 5mm Jack & a Two stage Gain Switch for MP3 MP4 Phones and Computers etc Product Features *eSynic Professional Headphone Amplifiers* : Our eSynic Mini HiFi Headphone Amplifier is with Impedance of up to 16 300, to Help Players with Low Thrust to Drive Headphones Better and Help Headphones with High Impedance or Low Sensitivity