LUXA2 LAVI S Bluetooth Triple-Mode Black Headphone AD-HDP-PCLS-BK-00:The finely tuned state-of-the-art 40mm drivers give the most dynamic user-to-music experience. Triple-Mode Wireless & Wired Connectivity with External Speaker. Wireless Range: 360 Degree,10m.Headset speaker: Speaker driver: Φ40mm.Impedance: 32Ω.Frequency response: 20Hz～20KHz.Sound press level: 109dB3dB.External speaker: Speaker driver: Φ40mm. Impedance: 4Ω.Output: 3W.Frequency response: 160Hz～20KHz.Sound press level: 81dB3dB.Microphone: Φ4.01.5mm, -423dB.Power Source: 1000mAh/3.7V (Li-polymer.)Playing time: up to 30 hours (headset)/ up to 3 hours (speaker) Charging time: 2 hours. Warranty: 1 year.