High-quality bluetooth headphones with high aesthetics and excellent performance. The ear cushions are made of special material, offering comfort and excellent isolation from external sounds. With the A770BL you will never be deprived of music because the built-in 250mAh battery is sufficient for up to 12 hours of music playback, and even if it runs out, they support playback with a cable! They are foldable and easy to carry, as they take up little space. - Playback up to 12 hours on a single charge - Soft ear cushions - Superior bass sound - Wireless and wired connection - Built-in microphone - Foldable design Technical specifications: Bluetooth Version: 5.0 Profile Support: HFP / A2DP / AVRCP Driver Unit: 40mm Sensitivity: 122dB ± 3dB Resistance: 32 Ohm ±15% Frequency response: 20 – 20000Hz Stand-by time: 25 hours Operating time: up to 12 hours Charging time: 1 hour Charging voltage: DC 5V Frequency range: 2.402MHz – 2.480MHz Operating temperature: -40°C / +85°C Transmission range: 10m Battery capacity: 250mAh