Monster Open Ear AC312 open-ear headphones, Bluetooth 5.4, 16 mm drivers, 32 h battery, IPX5

Open-ear comfort and awareness

Monster Open Ear AC312 headphones use an open-ear design that rests on top of the ear without entering the canal. This approach lets you hear music and calls while staying fully aware of traffic, colleagues or announcements. The 16 mm drivers deliver audio with a sensitivity of 105 decibels and a signal-to-noise ratio of 105 decibels. Weighing 180 grams, the set is built for extended daily wear.

Suited for active listeners, not isolation seekers

The IPX5 rating protects against sweat and rain during running, cycling or gym sessions. Bluetooth 5.4 provides a stable link up to 12 metres from the source device. Environmental noise cancellation helps the microphone pick up your voice clearly in busy settings. Buyers who need active noise cancellation to block ambient sound or prefer a sealed in-ear fit should consider a different style.

32-hour battery life decides the purchase

The integrated battery delivers 32 hours of operating time on a full charge, removing the need for daily top-ups. A wireless charging case is included for convenient replenishment between sessions. Touch controls on the earpieces handle playback, volume and calls without reaching for a phone. If your routine demands longer unbroken playback without a case recharge, this model will fall short.