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Black open-ear headphones resting on ears, silicone finish, charging case included

Monster Open Ear AC312 open-ear headphones black 16mm 32h IPX5 Bluetooth 5.4

SKU CH-BQAN-RPVNT

Open-ear headphones with 16 mm drivers, ENC noise-cancelling microphone, Bluetooth 5.4, 32-hour battery life and IPX5 water resistance

  • Driver size16 mm
  • Headphone styleOpen Ear
  • Signal-to-noise ratio105 decibels
  • Power supplyBattery, true
  • Audio sensitivity105 decibels
  • ConnectionNo Jack
  • Open-ear design keeps you aware of surroundings
  • 16 mm drivers deliver powerful bass
  • Environmental noise cancellation for clear calls
  • Bluetooth 5.4 gives stable connection up to 12 m
  • IPX5 rating resists sweat and rain

Open-ear comfort and awareness

Monster Open Ear AC312 headphones rest on top of the ear with an open-ear design that keeps the canal free. The 16 mm drivers deliver powerful bass while environmental noise cancellation filters background sound during calls. Bluetooth 5.4 provides a stable connection up to 12 meters. The IPX5 rating protects against sweat and rain.

Suited for active listeners who need situational

Runners, cyclists and commuters benefit from hearing traffic and announcements while audio plays. The lightweight 180 g build and silicone materials stay secure during intense movement. Buyers who require full noise isolation or deep passive bass response should consider closed alternatives. The design does not seal the ear canal.

32 hours total playtime decides suitability

The charging case stores enough energy for 32 hours of combined listening before a recharge is needed. This single figure determines whether the headphones cover a full work week of sessions or fall short for multi-day trips without a power source.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $30.99
Pricier than about 56% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand nameMonster
Model nameOpen Ear AC312
Part numberOpen Ear AC312
Product typeOn-Ear
Product colorBlack
Performance
Supported distance12 m
Audio & video
Driver size16 mm
Headphone styleOpen Ear
Signal-to-noise ratio105 decibels
Audio sensitivity105 decibels
Wearing styleOpen ear
Noise cancellationEnvironmental noise cancellation
Mic signal-to-noise ratio105 decibels
Mic sensitivity105 decibels
Connectivity
Wireless technologyBluetooth
Ports & slots
ConnectionNo Jack
Power
Power supplyBattery, true
Battery pack32 h
Run time32 h
Built-in batteryBattery
Size & build
Cord lengthWireless Charging Case
Product weight180 g
In the box
In the boxEarphones, User Manual, Wireless Charging Case

Questions about this item

What comes in the box with the Monster Open Ear AC312 and what must I buy separately?

The package includes the open-ear headphones and a wireless charging case. No audio cable is needed or supplied because the connection is entirely wireless via Bluetooth 5.4.

Which version of the Monster Open Ear AC312 should I choose?

This model is offered in a single black version with 16 mm drivers, IPX5 water resistance and 32 hours of battery life; there are no alternative capacities or colours to select.

What does the 32-hour battery figure mean in daily use?

You can expect up to 32 hours of total playback from a full charge of the earbuds and their case, giving several days of typical listening before you need to recharge.

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