This is a USB DAC amplifier that can be used with smartphones, tablets, and PCs. You can plug in earphones to devices that don't have an earphone jack. I recently purchased this and have been carefully storing it on a shelf at home. I am a non-smoker and I do not have any pets. No price reduction is available. Sorry. Returns and cancellations are not accepted. In the event of initial defects, please contact the manufacturer's support. I will ship via Yu-Packet Post as quickly as possible. If it can be combined with other items I am selling, I will discount the shipping cost. Please consult via comments. Please feel free to ask any other questions. Model: CB1200AU Compatibility: Android, iOS, Windows Interface: USB Type-C to 3.5mm Output: 65mW Sampling Rate: 32bit/384KHz SNR: >125dB DNR: >100dB THD+N: 95dB 0.0003% DSD: 64/128(PCM) Cable: 4 strands of single crystal copper + 4 strands of pure silver mixed, total 8 strands Shell Material: CNC embossed metal shell, surface treatment uses anodization and sealing glaze technology Size: 131mm Weight: 8g Functions: Supports software EQ tuning, supports microphone calls and switch control (The photos 1-10 are for illustrative purposes and do not represent the actual product. There may be changes in the details of the design, manufacturing paint unevenness, scratches, or dimensional errors. Please be aware of this.)