Features :

• Sound Head: Capacitor
• Output Power: 10mW (Headphone output) 5W (Speaker output)
• Frequency Range: 100Hz--10KHz
• Maximum SPL: About 115dB 1KHz
• Reverberation Mode: echo
• Power Supply: 5V   outside18650 battery
• Battery Capacity: 2600 mAh
• Charging Power: DC5V
• Battery Working Time:3-5 Hours
• Color: gold, silver, Rose Gold