Mini design、Suit ear very well. Wear comfortable! Support Anser call and listen music! ParametersTechnology: bluetooth 4.0Radio frequency: 2.402-2.480GHz Audio output: 35mW、 <15mATransmission range: <10 mCharging Power: input AC 110-240V; output DC 5VCharging time: 2 hours Talk time: 4 hoursMusic play: 3 hoursStandby time: 120 hours Wearing styles: In-Ear mini headphones Battery: 50mA rechargeable lithium batterySize: 30mm * 18mm * 15mmWeight: about 8.5g Package 1 x headphone 1 x manual 1 x charging cable