Monster N21 Bluetooth 6.0 Over-Ear Headphones

Bluetooth 6.0 connectivity delivers extended 10–20 m wireless range for uninterrupted audio.

Dual wireless and wired modes enable seamless switching between devices without reconnection delays.

Stay connected across your entire workspace or home without signal drops or pairing interruptions.

Next-Generation Wireless Freedom

• Extended Range Coverage: 10–20 m (32.8–65.6 ft) wireless range keeps you connected throughout your space without proximity constraints.
• Dual Connectivity Modes: Switch instantly between Bluetooth wireless and wired audio without manual re-pairing or device reconfiguration.
• All-Day Battery: Up to 25 hours of continuous playback on a single charge with 1–2 hour quick recharge via USB Type-C.
• Adaptive Sound Tuning: Bass Mode and Vocal Mode EQ presets optimize audio for music, podcasts, or calls without manual adjustment.

Technical Specifications

Design & Build

• Brand: Monster
• Model: Harmonic N21
• Design: Foldable
• Weight: 180 g (6.35 oz)
• Earcup Type: Sealed

Wireless Connectivity

• Bluetooth Version: 6.0
• Bluetooth Chip: Bluetrum
• Operating Frequency: 2.402–2.480 GHz
• Maximum Wireless Range: 10–20 m (32.8–65.6 ft)
• Communication Modes: Wireless + Wired

Audio Performance

• Driver Type: Dynamic
• Driver Size: 40 mm (1.57 inches)
• Number of Drivers: 2
• Frequency Response: 20–20,000 Hz
• Impedance: 32 Ω
• Sensitivity: 110 dB
• Audio Codecs: AAC, SBC
• Maximum Output: 30
• Sound Isolation: Sealed earcup design
• EQ Modes: Bass Mode, Vocal Mode

Microphone & Voice Control

• Microphone: Built-in
• Voice Assistant Support: Apple Siri, Google Assistant

Battery & Charging

• Battery Capacity: 300 mAh
• Battery Voltage: 3.7 V
• Battery Life: Up to 25 hours
• Charging Time: 1–2 hours
• Charging Port: USB Type-C
• Charging Method: Cable

Controls & Accessories

• Controls: Control Button, Volume Control
• Included Accessories: User Manual, Charging Cable