Specifications:  

• Suit: for all bluetooth device
• Technology: bluetooth 4.0
• Radio frequency: 2.402-2.480GHz
• Audio output: 35mW, <15mA
• Transmission range: <10 m
• Charging Power:  Input AC 110-240V;  Output DC 5V
• Charging time: 2 hours
• Talk time: 4 hours
• Music play: 3 hours
• Standby time: 120 hours
• Wearing styles: In-Ear mini headphones
• Battery: 50mA rechargeable lithium battery
• Size: 3* 1.8* 1.5cm
• Weight: about 8.5g