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Type: Headphones Earpiece Wireless Headphones with Microphone Width: 155 mm Depth: 67 mm Characteristics: Noise cancellation Built-in microphone Wireless Built-in battery Frequency: 20 - 20000 Hz Power supply: Rechargeable battery Colour: Black Connections: USB USB-C Connectivity: Bluetooth Wireless Type of headphones: External circumaural External supraaural Recommended age: Adults Year: 2021 Battery type: Litio Ion Rechargeable lithium battery Recommended use: Office/Call center

Type: Earpiece Headphones Wireless Binaural Recommended use: Oficina/Centro de llamadas Battery type: Litio Ion Width: 155 mm Characteristics: Built-in battery Wireless Cable length: 1,5 m Frequency: 20 - 20000 Hz 20-20000 Hz Connectivity: Bluetooth Bluetooth 5.1 Connections: USB USB-A Colour: Black Depth: 67 mm

Type: Headphones Earpiece Wireless Headphones with Headband Wireless Headphones Headphones with Microphone Charging base: Yes Width: 155 mm Depth: 67 mm Characteristics: Noise cancellation Built-in microphone Wireless Built-in battery Frequency: 20 - 20000 Hz Power supply: Rechargeable battery Colour: Black Connections: USB Connectivity: Bluetooth Wireless Bluetooth 5.1 Type of headphones: External supraaural Compatible: Windows 10 Mac OS Includes: Charging base Case USB Type-A Cable length: 1,5 m Approx. autonomy: 24 hours Battery: Yes Recommended age: Adults Material: Leather Headphones: Binaural Year: 2021 Recommended use: Calls and music Battery type: Litio Ion Rechargeable lithium battery

Type: Earpiece Headphones with Headband Headphones Wireless Binaural Battery type: Litio Ion Width: 155 mm Characteristics: Built-in battery Battery: Yes Charging base: Yes Cable length: 1,5 m Type of headphones: External supraaural Connectivity: Bluetooth Bluetooth 5.1 Colour: Black Depth: 67 mm Connections: USB-A Includes: Case Approx. charging time: 1,5 hours Warnings: Do not disassemble or modify the product on your own..

Type: Headphones Earpiece Wireless Headphones with Headband Binaural Headphones with Microphone Charging base: Yes Width: 155 mm Depth: 67 mm Characteristics: Noise cancellation Built-in microphone Wireless Built-in battery Power supply: Rechargeable battery Compatible: macOS Windows 10 Mac OS Approx. weight: 162 g Approx. charging time: 1,5 hours Colour: Black Material: Plastic Connections: USB USB-A Connectivity: Bluetooth Wireless Bluetooth 5.1 Type of headphones: External supraaural Includes: Charging base Case USB Type-A Cable length: 1,5 m Approx. autonomy: 24 hours Battery: Yes Recommended age: Adults Headphones: Binaural Year: 2021 Recommended use: Calls and music Battery type: Litio Ion Rechargeable lithium battery WARNINGS: Do not disassemble or modify the product on your own..

The HP model 77Z31AA is a pair of Bluetooth wireless headphones designed to offer versatile connectivity and comfort in both professional and personal settings. Featuring a black finish , these headphones combine Bluetooth 5.1 technology for a stable and fast connection with physical connection options via USB and USB-C ports , ensuring compatibility with a wide range of devices. Besides wireless connectivity, they provide a balance between mobility and performance, freeing the user from cables and enabling freedom of movement—ideal for those needing to stay productive at home or in the office. Their design includes an integrated microphone, suited for clear calls and communications, making them optimal for remote work or video conferencing environments. The audio frequency response ranges from 20 Hz to 20,000 Hz , ensuring sound quality suitable for both music and voice. Weighing 158 grams , they allow comfortable prolonged use without fatigue, and although they include a 1.5-meter cable for charging or wired connection, their main value lies in wireless functionality and the freedom it provides. These headphones are part of a tech solution that also includes a Bluetooth adapter (BT700) and a charging stand, facilitating full integration into the work environment. In short, the HP 77Z31AA stand out for their versatility, audio quality, and wireless connection stability , making them a solid choice for users who need comfortable, functional headphones in a modern and efficient format. Type: Headphones Earpiece Wireless Headphones with Headband Headphones with Microphone Includes: USB-C Cable Charging base Case Charging base: Yes Width: 155 mm Depth: 67 mm Characteristics: Noise cancellation Built-in microphone Wireless Built-in battery Frequency: 20 - 20000 Hz Power supply: Rechargeable battery Colour: Black Connections: USB USB-C Connectivity: Bluetooth Wireless Bluetooth 5.1 Type of headphones: External supraaural Compatible: Windows 10 Mac OS Cable length: 1,5 m Approx. autonomy: 24 hours Battery: Yes Recommended age: Adults Material: Leather Headphones: Binaural Year: 2021 Recommended use: Calls and music Battery type: Litio Ion Rechargeable lithium battery