Function: With Bluetooth 5.0 / USB / 3.5mm AUX audio input, it is compatible with the most common audio devices such as mobile phones, tablets, computers, TVs, CD players, decoders, preamplifiers, etc. Bluetooth 5.0 wireless input, faster and more stable transmission, USB input plug and play, no driver required. Complete accessories, you can enjoy its powerful functions immediately after receiving it. Adopting the classic TPA3116 chip, the maximum output power is increased to 100W (50W*2), which can drive most home speakers. HiFi clear and delicate sound, no audible noise even at high power. Ultra-mini size, exquisite appearance, five colors of aluminum shell (black/silver/gold/blue/red) are free to choose, which can provide HiFi music and decorate your home or office, very suitable for home and desktop audio system use. Parameters: Color: Black Bluetooth Version: 5.0 Rated Power: 50W*2 Channels: 2.0 Impedance: 4-8 ohms Audio Input: Bluetooth/USB/3.5mm AUX Audio Output: Banana Speaker Connector Power Supply: DC 9V-24V Dimensions: (H)78 * (W)70 * (H)38mm (3.07 2.76 1.50 inches) Net Weight: 154g/0.34lb Package Weight: 0.45kg/0.99lb Package Contents: 1 x Amplifier Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.