Bluetooth hands-free headset

I am selling a new Bluetooth handsfree headset - a universal bluetooth headset compatible with all devices with a bluetooth function. Volume adjustment directly on the handsfree. Sensitivity: 123 dB. Frequency range: 20-20000Hz Connection range: 10m. Battery life during phone calls: 10 hours. Battery life while listening to music: 8 hours. Battery life in standby mode: 20 days. Bluetooth 5.0 Charging time: 2 hours Price €15 Tel. no. 0940123185