Customized senior shielding inductor approved by audiophiles in popular forums,improving the most important LC filtration procedure for digital amplifiersReal 2 x 20W stereo circuit design,Built-in circuit for speaker protection and start delay,ensuring that there is no impact sounds upon shutdown/start up and that your valuable speaker would be well protected ( speaker will be included in the circuit 3 seconds after start up )Humanized protection,start up indicator ( The inner circuit would use double-color indicator.When the power is on,the indicator would be yellow.After 3 seconds it would turn red,signaling the involvement of the speaker )The circuit uses massive audio components of high quality,Surface mounting technology,showing neat outlook and firm welding points,The Bluetooth Hi-Fi wireless connection 4.0 Bluetooth module,ensuring high-quality audio transmissionColour:Black Material:aluminum alloyProduct size:15.5x 11 x 4cmPackage Contents:1 x Kentiger V10 Power Amplifier1 x Rempte Control1 x English User ManualOnly the above package content, other products are not included.Note: Light 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.