Havit H2586BT Wireless foldable headphone Features: -Foldable Headphone -Double Enjoyment (Wired + Wireless) -Enhance the sound insulation, Easy to isolate external noise to create a perfect music enjoyment surroundings -Imitation protein leather for Soft Comfort Specification? -Bluetooth Version?V4.2 -Wireless working range: 10M (without obstacles ) -Charging means: micro USB -Speaker: 40mm -Speaker sensitivity: 110±3dB at 1KHz;1mW -Speaker frequency: 20-20KHz -Rated power: 8mW-12mW -Input voltage: DC 5V -Battery: Rechargeable 3.7V 300mAH Li-polymer battery -Play time: Up to 10H -Talk time: Up to 10H -Charging time: About 3H -Standby time: Up to 300H -Voice chat: supported -Voice prompt: supported - Dimension: 168 x 73 x 187 mm (L x W x H) - Weight: 172g (Approx.) What's in the box 1 x Headphone