LUXA2 LAVI L Bluetooth 4.0 On-Ear Black Headphone AD-HDP-PCLL-BK-00:The finely tuned state-of-the-art 40mm drivers give the most dynamic user-to-music experience.Adjustable and foldable design allows for a perfect fit for all sized users.Wireless Range: 360 Degree, 10m. Impedance: 32Ω.Playing time: up to 8 hours. Input: DC 5V/500mA, Mini USB. Profile: A2DP, AVRCP, HSP, HFP. Frequency: 2402MHz-2480MHz.Speaker driver: Φ40mm. Frequency response: 20Hz～20KHz.Sound press level: 110dB3dB.Microphone: Φ4.01.5mm, -423dB.Power Source: 250mAh/3.7V (Li-polymer.) Battery dimension: 30303mm.Warranty: 1 year.