LUXA2 LAVI D Bluetooth 4.0 Dual-Mode Black Headphones AD-HDP-PCLD-BK-00.The finely tuned state-of-the-art 40mm drivers give the most dynamic user-to-music experience.Wireless Range: 360 Degree, <=10mImpedance: 32ΩPlaying time: up to 16 hours. Profile: A2DP, AVRCP, HSP, HFP Frequency: 2402MHz-2480MHz Speaker driver: Φ40mm Frequency response: 20Hz～20KHz Sound press level: 113dB3dB Microphone: Φ4.01.5mm, -423dB Power Source: 450mAh/3.7V (Li-polymer) Battery dimension: 30386mm Warranty: 1 year