GENERAL
Driver Unit (mm): 6 mm (1/4 in)
Frequency Response: 20 Hz – 40 kHz (LDAC 96 kHz/990 kbps)
Mic: Monaural, MEMS Mic
Playback Time with Battery (LDAC)
Earphones
Approx. 3.5 hours (NC ON)
Approx. 4.0 hours (NC OFF)
Earphones with Charging case
Approx. 12 hours (NC ON)
Approx. 14 hours (NC OFF)
Playback Time with Battery (AAC)
Earphones
Approx. 5.5 hours (NC ON)
Approx. 7.0 hours (NC OFF)
Earphones with Charging case
Approx. 18 hours (NC ON)
Approx. 24 hours (NC OFF)
Charging Time (25°C/ 77°F)
Earphones
Approx. 2.0 hours
Charging case / USB
Approx. 2.5 hours
Charging case / Qi *With certified Qi charger
–
Earphones with Charging case / USB
Approx. 3.0 hours
Earphones with Charging case / Qi *With certified Qi charger
–
Quick Charge (15 minutes, AAC)
Earphones: Approx. 60 minutes (NC ON)
Standby Time
Earphones
Approx. 9.5 hours (NC ON),
Approx. 20 hours (NC OFF,
Auto power off does not work)
Dimensions (W x H x D)
Earphones *with Earpiece M size
Approx. 22 mm x 26 mm x 24 mm
Charging case
Approx. 68 mm x 33 mm x 28 mm
Weight
Earphones (one side only: L and R are the same): Approx. 5 g (0.18 oz)
Charging case: Approx. 35 g (1.2 oz)
Supplied Accessory
USB charging cord: Approx. 0.2 m (0.66 ft)
(Input Plug : USB Type-C Shape,
Output Plug : USB Type-C Shape),
Earpieces set : XS, S, M, L (M attached)
Advanced Function
Bluetooth® Wireless Technology
Version: 5.3
Supported Profiles: A2DP, AVRCP, HSP, HFP
Codec: SBC, AAC, LDAC
Operating Distance: Up to 10 m (33 ft)
Multi-point: Yes(Connect up to 3 devices at a time.)
Multi-pairing: Yes(Connect up to 10 devices.)
Water Resistance: IPX4 Equivalent (Earphones only)
Dual Hybrid Noise Cancelling: Yes(Feed-Forward only)
More Info: https://www.technics.com/uk/products/headphones/eah-az40m2.html
https://www.youtube.com/watch?v=DS0hHkjgh40