Casti Audio-Technica ATH-CKS50TW True Wireless

MAIN FEATURES
Bluetooth® 5.2
50 hour battery (20 hours in the earbuds + 30 hours in the charging case)
Fast charging support - 10 minutes = 90 minutes of power (approx)
Multi-point pairing function for registering multiple devices
9mm Solid Bass HD TWS drivers
Noise-cancelling mode
Hear-through function
Built-in mic and controls
IPX4
Qualcomm® cVc™ Generation 8.0
Qualcomm® TrueWireless Mirroring
SCMS-T protected content and 1seg broadcasting support
Voice guidance function*1
Compatible with Sony’s 360 Reality Audio*2

HEADPHONES
Type: Dynamic
Driver Diameter: 9 mm
Frequency Response: 5 to 20,000 Hz
Sensitivity: 110 dB/mW
Impedance: 20 ohms
Weight
- Headphones: Approx. 8 g (0.28 oz) (L side), approx. 8 g (0.28 oz) (R side);
- Charging case: Approx. 60 g (2.1 oz)
Charging Time
- Headphones: Approx. 3 hours
- Charging case: Approx. 3 hours The figures above depend on operating conditions.
Operating Temperature: 5 °C to 40 °C (41 °F to 104 °F)
Operating Time: Continuous transmission time (music playback): Max. approx. 20 hours (headphones), Max. approx. 50 hours (if charging case is used in combination) The figures above depend on operating conditions.
Microphone Type: MEMS type
Microphone Sensitivity: -38 dB (1 V/Pa, at 1 kHz)
Microphone Frequency Response: 100 to 8,000 Hz
Microphone Polar Pattern: Omnidirectional
Power Supply
- Headphones: DC 3.7 V lithium ion battery
- Charging case: DC 3.7 V lithium ion battery
Water-Resistant (drip-proof) Performance: IPX4 Headphones only
Accessories Included: USB charging cable (30 cm (12"), USB Type-A / USB Type-C), Eartips (XS, S, M, L)

BLUETOOTH®
Bluetooth® Version: Bluetooth version 5.2
Operating Range: Line of sight - approx. 10 m (33')
Maximum RF Output: 10 mW EIRP
Frequency Band: 2.402 GHz to 2.480 GHz
Modulation Method: GFSK, Pi/4DQPSK, 8DPSK
Spread Spectrum Method: FHSS
Compatible Bluetooth Profiles: A2DP, AVRCP, HFP
Support Codec: Qualcomm® aptX™ Adaptive audio, Qualcomm® aptX™ audio, AAC, SBC
Supported Content Protection Method: SCMS-T
Supported Sample Rates: 44.1 kHz, 48 kHz
Supported Bit Rates: 16 bit, 24 bit When using Qualcomm® aptX™ Adaptive audio.
Transmission Band: 20 to 20,000 Hz