Lets review new wireless monitor headphones Plantronics BackBeat PRO+ with active noise-canceling. Manufacturer tells almost nothing about their audio technical specifications, there is no information about : used magnets, reproduceable sounds frequencies range, impedance, signal/noise ratio and maximal power input – this already rises suspicion. 40 mm drivers are built into them ( this is relatively small diameter for high-quality basses reproduction ), Bluetooth connection has 100 m range ( there is ability to use 3.5 mm mini-jack connector and USB connection for battery recharging ), one charge of battery is enough for 24 hours of work and there are buttons for phone, playback and volume control. Active noise-canceling can be disabled, if needed, to hear what’s going on around; price, that manufacturer asks for this device, is 300 USD ( for such money there is ability to buy semiprofessional photo camera kit with bundled lens, is there something in these headphones, that is equal to such high-tech device? ). Package contains : Plantronics BackBeat PRO+ headphones themselves, wireless receiver-transmitter, 3.5 mm mini-jack cable, USB cable for battery recharging and user’s guide. Overall, manufacturer tells almost nothing about about their sound technical characteristics and asks very high price for them; there is ability to buy more than 3 times cheaper professional studio monitor headphones with known very good technical details, which this model does not have; and there is ability to buy much cheaper consumer-grade wireless active noise canceling headphones with known very good technical audio details of other manufacturers. So, this model Plantronics BackBeat PRO+ is not recommended for purchasing and it is better to look on other devices.