The Audio-Technica M20xBT are over-ear wireless headphones that take the sound of the wired M20x headphones into the world of portable listening. Punchy 40 mm drivers ensure that the M20xBT keep their detailed and full sound with enhanced bass. With the M20xBTs efficient design you also get an on-board microphone for making calls control buttons and an optional cable for wired connections. The M20xBT offer a range of innovative features including multipoint pairing that lets you wirelessly connect up to two devices at once for multimedia experiences and low latency mode to ensure your audio and videos remain in-sync. These wireless headphones also boast up to 60 hours of continuous use from a full charge or can operate for three hours on a rapid 10-minute charge. The M20xBTs soft padded earcups and headband make sure that you get a comfortable fit for long listening sessions so wherever you need to travel to and how long you want to listen theyll be right with you. Studio sound on the go Wireless headphones sometimes sacrifice sound quality in order to deliver the portability and convenience of Bluetooth connectivity. However the M20xBT have been tuned by Audio-Technica to sound exactly like the original wired model when used wirelessly or wired. These headphones let you bring accurate clear studio sound on the road with you so you can listen to your favourite songs on the go without losing quality and connect the wire for mixing or production sessions when you get where youre going. Long-lasting battery The M20xBT have been designed to get the very most out of their internal battery. They offer up to 60 hours of continuous use from a single charge so no matter where youre going or how long for your headphones will be ready when you need them. Plus a rapid-charge function allows you to get 3 hours of battery life from a hurried 10 minutes of charging perfect for when youre pushed for time. Features Wireless Bluetooth headphones that offer the same sound as the M20x wired model 40 mm drivers with copper-clad aluminium voice coils provide clear enhanced bass Low latency mode ensures your wireless audio playback stays in sync with video perfect for streaming and gaming Multipoint pairing allows you to connect to two devices at once via Bluetooth Up to 60 hours of battery life from a full charge and 3 hours battery from 10 minutes of rapid charging Charges via USB-C for quick and efficient charging Microphone and buttons built-in on left earcup allow you to make calls and control your audio Closed-back design provides high isolation and privacy in busy surroundings Durable and comfortable build from padded headband and soft earcups make long listening sessions easy Included 1.2 m (3.9″) cable for wired connection optionSpecifications Type: Closed-back dynamic Driver Diameter: 40 mm Frequency Response: 5 Hz to 32 kHz Sensitivity: 100 dB/mW Impedance: 36 Ω Weight: 216 g (7.6 oz.) Charging Time: Approx. 4 hours Operating Temperature: 5°C to 40°C (41°F to 104°F) Operating Time: Maximum 60 hours continuous transmission time (dependent on operating conditions) Microphone Sensitivity: -42 dB (1 V/Pa @ 1 kHz) Microphone Frequency Response: 50 Hz to 20 kHz Microphone Polar Pattern: Omnidirectional Power Supply: DC 3.7 V lithium polymer battery Accessories Included: USB charging cable (30 cm (12”) USB Type-A / USB Type-C). Audio cable (1.2 m (3.9’) /3.5 mm (1/8”) gold-plated stereo mini-plug (3 pole/L-shaped) Bluetooth Version: Operating Range: 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 HSP Support Codec: AAC SBC Supported Content Protection Method: SCMS-T Transmission Band: 20 Hz to 20 kHz Product Code: ATH-M20XBT