Frequency response range: 100HZ-20KHZ Signal-to-noise ratio: ≥75dB Box material: plastic Color: blue, black, red Power supply: USB Built-in battery capacity: 1000mAh Wireless transmission range: Up to 10 meter Speaker drive size: 3 inch Output power: 5W Scan range: 87.5 – 108.0MHz USB Charging: DC5V Max Memory support (USB/SD): 32GB Play time: up to 1.5 hours at 75% Volume Charging time: 2 hours