beyerdynamic Xelento Wireless, Wireless In-Ear Headphones, Hand-made, Bluetooth, Tesla technology, Up to 5.5 hours operating time, Codes aptX HD, aptX, AAC, SBC, Ergonomically shaped housing in lightweight construction, Cable management behind the ear, Bluetooth connection cable (pluggable MMCX) with remote control and microphone + battery pack, 1.3 m Silver-plated cable (pluggable MMCX) with 3-button remote control and hands-free microphone (compatible with most Apple and Android devices), 3.5 mm Jack plug (4-pin), Closed, Impedance: 16 Ohms, Transmission range: 8 - 48,000 Hz, Maximum sound pressure: 110 dB / 1 mW / 500Hz, Includes 7 pairs of silicone earmolds, 3 pairs of Comply earmolds, case, cable clip, USB charging cable, Made in Germany