Description: brand new and high quality Feature: This is Nobsound's new power amplifier. Based on our previous product, we enhance its output power and improve its functionality, while still keep its mini size and elegant design. Despite its mini size(can be hold with one hand), the output power is improved to 100W(50Wx2) with the upgraded chip TPA3116. You will be amazed by its output power compared to its size when you see it. Supporting for AUX/USB/Bluetooth-compatible input. You can enjoy your music in different ways. The Bluetooth-compatible function is also upgraded. Now it is more stable and faster. We need to mention that with the USB input, music can be played losslessly(Like connecting with a computer. By the way, you don'for t need to install a driver). You will be surprised by the sound quality. Bluetooth-compatible Power Amplifier only, other accessories demo in the picture is not included Specifications: Item Type: Bluetooth-compatible Power Amplifier Size: 77x70x38mm/3x2.7x1.4in Color: As shown in the picture. Power: 50W+50W Power Supply: DC9V-24V Bluetooth-compatible Connection Distance: 10 meters or less Bluetooth-compatible Version: 4.0+EDR Channel: 2.0 Impedance: 4-8 ohms Quantity: 1 Set Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes: 1 x 50Wx2 Bluetooth-compatible Power Amplifier 1 x AUX Input Line 1 x RCA Audio Cable 1 x User Manual