Sensitivity: 85dB
FM radio signal to noise ratio: ≥ 84dB ± 4
MINI USB5PIN Audio Frequency

Response: 150Hz ~ 20KHz
Speaker Unit: 1 * 50MM

Impedance: 4Ω
Speaker System: 1.0-channel

Mp3 stream rate: 32Kbps ~ 320Kbps
Power supply: built-in lithium battery, 3.7V ~ 4.5V Rated power: 3w * 1
220V power input optimum temperature range: 0 °C ~ 50 °C
Material: Plastic gold or silver Size: 6.6CM * 17CM
LED charging remind Box size: 17 * 7 * 7CM
Carton size: 72.3 * 36.7 * 36CM