Advanced Bluetooth 5.4 Technology for stable and quick connectivity High-Definition Lossless Decoder Chip for crystal clear sound Multiple interfaces to connect with audio devices Compact and design, ideal for both home and professional use Power input: 5V Bluetooth chip: QCC3084 (supports , AAC, , - LL, - HD, - adaptive, LDAC) Bluetooth version: 5.4 Bluetooth sampling rate: Up to 24bit 96k supported DA chip: ES9039Q2M*2 Operational amplifier: OPA1642*3 Output mode: lotus connector, 3.5mm headphone jack output Output voltage: 2V Frequency response: 20Hz - 20kHz Signal - to - noise ratio: - 110dB (The product appearance and printed words depending on the batch, but this does not affect use) Color:Silver Material:Aluminum Alloy Package Contents: 1 * Audio Amplifier Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.