• material: metal •power output: 1*3W •size: 50 x 137.7mm
• Frequency range: 75HZ-20KHz •With FM function
• S/ N: ≥90db
• speaker: 4∩ 3W
• Charge voltage: DC 5V
• With 3.5mm audio jack
• music form: MP3, WMA, WMV, ASF