o input: 3.5mm stereo input, USB o input, Bluetooth 5.0, RCA input, TF card, USB input (compatible with computer, mobile phone, OTG) Featuring TPA3116 chip, maximum power output reaches 50W; with 12V 5A power supply, actual output power achieves 30W*2 at 4 ohms Hi-Fi sound quality with clear and crisp o, no ble noise. Engineered with optimized circuit design to ensure noise-free performance even at maximum output Long press the switch to turn on Output power: 50W + 50W Power requirements: DC 9V–24V Bluetooth range: Up to 12 meters (without obstacles) Bluetooth version: Bluetooth 5.0 Speaker impedance: 4Ω–16Ω Color: Black Material: Plastic Package Contents: 1 x Digital o Power Amplifier Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the product image and the actual item. Measurement error allowed within +/- 1–3 cm.