Razer Seiren Elite...

Dual noise sensor technology, featuring two microphones on each earcup, captures ambient noise and passes the data to the HD Noise Cancelling Processor QN1. Using a new algorithm, the HD Noise Cancelling Processor QN1 then applies noise-cancelling processing in real time to a range of acoustic environments.To maximise noise-cancelling performance, the WH-1000XM4 headphones incorporate two technologies: Personal Noise-Cancelling Optimiser, designed specifically for you, and Atmospheric-Pressure Optimising, designed specifically for air travel.Adjust ambient sound with the Sony | Headphones Connect app to cancel noise while still allowing essential sounds, like transport announcements, through when you're listening on the move.A built-in analogue amplifier integrated in the HD Noise Cancelling Processor QN1 realises an unmatched signal-to-noise ratio for low distortion and exceptional sound quality for portable devices.Powerful 40-mm drivers with Liquid Crystal Polymer (LCP) diaphragms make the headphones perfect for handling heavy beats and can reproduce a full range of frequencies up to 40 kHz.

Lenovo half in-ear earphone features high-grade cable, remote control and dynamic drivers maintain great musicality and comfortFinely engineered dedicated dynamic drivers handle treble, mids and bass and produces Energetic, rhythmic, and Hi-Fi soundFurnished with top-class ear case and superior cables ensure priceless comfort and lasts longer than a usual earphoneExperience the crystal-clear sound output regulation, brought you by the built-in brand new remote control, thanks to the unrivalled mic for noise-free calling

BT 5.1 chip ensures stable and fast connection, low power consumption and low latency.Adopt 13mm dual-frequency moving coil unit, high frequency analysis, restore sound details without distortion.After the first pairing, just take the earbuds out of the charging case, the earbuds will automatically connect with your mobile phone.Semi-in-ear design, fit the ear canal, bringing comfortable wearing experience.Built-in microphone, AAC/SBC audio decoding, clear sound quality.

Driver sensitivity range is about 1kHz/1mW (dB) with impedance 14 ohmsDynamic frequency response range is about 20Hz?20 kHzWith up to 25 hours 5 hours from the earbuds and 15 hours from the case of battery lifeBluetooth frequency range is up to 2.4-2.4835 GHzTransmitted modulations are GFSK, ?/4 DQPSK, 8DPSK and 55mAh 3.7V battery