Closed-back headphones – Bluetooth – Built-in microphone – Volume control – Bluetooth Version 5.2, Bluetooth Power Class 1, Frequency range: 2.4 GHz, Interfaces: A2DP, AVRCP, HFP, HSP, Supported codecs: SBC, AAC Frequency response: 20 Hz – 20,000Hz (44.1kHz sampling), Multi Pairing, Multi Point – allows pairing with two Bluetooth devices simultaneously Equalizer functions with customization options, 360 Reality Audio Setting, DSEE, Automatic shutdown, Call functions: HD Voice, echo cancellation, noise suppression, SideTone Voice assistants: Google Assistant, Siri Sony Headphones Connect, Google Fast Pair, Now Playing Technical features: On-ear closed dynamic headphones, 30 mm driver, Frequency response: 20Hz-20,000Hz (44.1kHz sampling) Power and Battery: Integrated rechargeable lithium-ion battery 300mAh DC 3.7 V, Battery life: Approximately 50 hours with Bluetooth playback, Approximately 40 hours in communication Charging time: Approximately 3 hours for a full charge, The unit can be used for 90 minutes after 3 minutes of charging Charging via USB Type-C port, Nominal power consumption: 1.4 W – Bluetooth On-ear headphones, 30mm driver, Battery life up to 50 hours with fast charging, 360 Reality Audio certification, Multipoint connection allowing pairing with two Bluetooth devices simultaneously, Crystal-clear hands-free calls. Color: Blue