* Model: OS-D26(01) * Working range: 10 meters * Wireless frequency : 2.40-2.48GHz * Charging box capacity: 200mAh * Charging voltage: DC5V 3. 7V, 200mAh * Charging time: about 2 hours * Talk time: about 3 hours * Play music: about 4 hours * Storage time: about 5 months * Earphone built-in battery: lithium battery   * Model: OS-D25(01) * Working range: 10 meters * Wireless frequency : 2.40-2.48GHz * Charging box capacity: 200mAh * Charging voltage: DC5V 3. 7V, 200mAh * Charging time: about 2 hours * Talk time: about 3 hours * Play music: about 4 hours * Storage time: about 5 months * Earphone built-in battery: lithium battery    

Wireless Version:BT V5.1 Operating Distance: 10m Battery:30mAh x2(Earbuds) 200mAh(Charging Case) Music playing time:4-6Hrs Connection: Wireless automatic pairing