Usage Tips:Features: With Bluetooth 5.0 / USB / 3.5mm AUX audio input, compatible with most common audio device such as phone, tablet, computer, TV, CD player, decoder, preamp and so on. Bluetooth 5.0 wireless input achieves faster and more stable transmission, USB input plug and play, no need for any driver. Equipped with complete accessories, you can enjoy its powerful function at once when you receive it. Adopting classical TPA3116 chip, the max output power is improved to 100W(50W*2) which can drive most home speakers. HiFi clear and delicate sound, no audible noise even at high power output. Super mini size with exquisite appearance, aluminum case of five colors (black/silver/gold/blue/red) for freely choose, can provide HiFi music and decorate your home or office, very suitable for home and desktop audio system use. Parameters: Colors: Black Bluetooth Version: 5.0 Rated Power: 50W*2 Channel: 2.0 Impedance: 4-8 ohms Audio input: Bluetooth / USB / 3.5mm AUX Audio output: banana speaker jacks Power Supply: DC 9V-24V Dimensions: (L)78 * (W)70 * (H)38mm (3.07 2.76 1.50 in) Net Weight: 154g / 0.34lb Package Weight: 0.45Kg / 0.99lb Package Includes: 1 Amplifier 1 Audio Cable