Sony Hear In 2

High-Resolution Audio support for uncompromising sound via wired listening Listen longer with up to 7.5 hours battery life, In-ear comfort and style, Lightweight, behind-the-neck design Clear hands-free calling via Bluetooth, Wide frequency response for pure audio, Enjoy higher quality Bluetooth streaming with LDAC Frequency Response: 5 Hz-40 kHz(Wired). Sensitivities (dB/mW): 105 dB / mW (when using the dedicated headphone cable)