The Chinese company OPPO presented fully wireless headphones Enco W31. The novelty received 7-mm drivers with binaural data transfer function and low signal delay value. The headphone housings are protected according to the IP54 standard, which means that they are not afraid of dust and splashes falling in any direction.According to the manufacturer, the headphones can work on a single charge for up to 3.5 hours. With periodic recharging in a complete case, the battery life increases by almost five times – up to 15 hours. There is also high-speed charging – just 10 minutes in the case is enough to get an additional hour of listening to music. There are four built-in microphones that provide high-quality voice transmission when used as a headset, as well as the necessary functions for active noise reduction.