Model Sabbat E12 Ultra Bluetooth range Up to 10m (about 33 feet) Microphone Yes Driver 10mm Dynamic Battery 50mAh, 37V Frequency response 20-20000Hz Sensitivity 101±3dB @ 1kHz, 1mW Impedance 32Ω Battery 750mAh, 37V Charging time Approximately 1 hour Charging interface Type-C Playtime Approximately 6