Bluetooth in-ear entry in the high performance range: The LZR 548 BT with an integrated precision stereo amplifier & 9.2 mm Laser-Tech driver – Klippel-optimised of course! Optimum sound performance combined with easiest possible operation on the premium cable. Includes hands-free telephone use with high speech quality. Flexible thanks to three ear adapter sizes and sports adapter for a perfect fit while training. Color: Titanium vs. Black.SpecsPrinciple: Bluetooth In-Ear HeadphoneDriver: 9.2 mm laser technology driverFrequency Response: 15 – 23.000 HzDistortion: (1 kHz, 106 dB) < 0,20 % THDColors: Titanium vs. BlackDimensions: 12 x 18 mm (WxH) 500 mm (L)Weight: 14 gFeaturesHigh-performance in-ear Bluetooth headphoneDeveloped in GermanyPremium design by DWX Thiele9.2 mm Klippel-optimized laser tech driverIntegrated high-performance lithium-ion battery: lasts up to 8 hours, rechargeable via USB in less than 1 hourBluetooth® operation (volume, play/pause, next/last track, phone) from many smartphones via control elements on the integrated cable remote controlPremium flat cable with integrated remote control and compact rechargeable batteryVery comfortable to wear thanks to optimized ergonomicsNoise isolation ear-tips in three size.