FEATURES: Cordless design allows freedom in style without restricting movement Seamless construction is sweat proof for the perfect balance of comfort and performance On-ear control for volume up/down, down/previous, play, pause, pairing, answer the phone and power on/off Includes recharging case for safe storage and longer listening sessions TECHNOLOGY: Bluetooth(R) v5.0 connectivity for easy pairing to all devices Built-in microphone for answering calls and using voice commands without removing headphones Voice prompts for announcing system operations SPECS: Battery Life: 3 hours at 50% volume Wireless range: 49 ft. Frequency Response: 20Hz- 20kHz Sensitivity: 107 dB+/-3dB at 1kHz Driver: 10mm Nominal impedance: 32ohms Charge time: 120 minutes Styles: IAEBT270B