Stereo bluetooth headphones in minimalist design with microphone for listening to music and making phone calls. Packed in SWISSTEN retail pack.Design:The SWISSTEN STONEBUDS headphones are very comfortable thanks to their ergonomic shape and minimalist design. Therefore, you can enjoy listening to your favorite music in full sips in complete comfort.Rechargeable case:The elegant rechargeable case will give you the opportunity to charge your headphones anywhere and will significantly extend the life of your headphones up to four times.Bluetooth connection:Enjoy listening to music with the miniature bluetooth headphones SWISSTEN STONEBUDS.SPECIFICATIONS:Bluetooth: v5.0True Wireless Stereo - TWSRange: 10 mHeadphone battery capacity: 2 x 45 mAhBox battery capacity: 300 mAhEndurance: 2.5 hoursCharging cable: Micro USB (included)Charging time: 2 hrsBox size: 70 x 39 x 31 mmBT profiles: A2DP, AVRCP V1.5, HFP V1.6, HSP V1.2Frequency range: 20 Hz - 20 kHzSensitivity: 105 dB SPL (sound pressure level) at 1 kHzImpedance: 16 Ohm