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- Standby time: up to 300 hours - Music/talk time: up to 4-5 hours (portable charging box up to 20 hours) - Battery type: rechargeable lithium ion polymer battery - Battery input: earbuds: 5V / 75mA - Battery output (portable charging box): 5V / 1A - Battery capacity: Portable charging box: 800mAh - Bluetooth version: dual mode Bluetooth V4.2 + EDR, ultra low power consumption - Support Agreement: A2DP1.3 / HFP1.6 / HSP1.2 / AVRCP1.6 / D11.3 - Bluetooth band: 2.4GHZ - Bluetooth transmission distance: 12 meters - Noise reduction: CVC6.0 - Headphone capacity: 75mAh for both left and right ears - Standby time: approximately 360 hours in the charging compartment - Continuous song: about 4 hours - Charging time: about 30-60 minutes - Stereo Audio: Dual Track Stereo Package Included: - 2 Bluetooth earphones - 1 portable charger box - 1 x USB charger cable - 1× user manual - 4 x silicone earmuffs Note: If you have any questions, please contact us.