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Ruo Shui Shi Sha Launches OpenFeel Mk2 Clip-On Earphones

Ruo Shui Shi Sha has released the OpenFeel Mk2 clip-on earphones, emphasizing Hi-Fi sound quality and ventilated comfort. The earphones weigh just 39 grams and feature a "Planck 2.0 transducer."

5 August 2026
Ruo Shui Shi Sha Launches OpenFeel Mk2 Clip-On Earphones
Image is an AI-generated illustration

Chinese technology firm Ruo Shui Shi Sha has launched its OpenFeel Mk2 clip-on earphones, focusing on delivering Hi-Fi sound quality and a comfortable, ventilated wearing experience. The earphones weigh a mere 39 grams and incorporate the company's proprietary "Planck 2.0 transducer."

The OpenFeel Mk2 design features a "waist-like U-shaped bridge" and a "ventilated pressure-release" system for comfort. The clip-on portions are made from skin-friendly silicone, and an ergonomic contouring aims to ensure a secure fit during various activities.

For audio performance, the earphones are equipped with the Planck 2.0 transducer, specifically designed for open-back configurations. This is complemented by a liquid crystal dome flexible suspension diaphragm, a beamforming acoustic system, and dual DAC decoding chips. The setup also includes a four-microphone array for Environmental Noise Cancellation (ENC).

Battery life is rated at 9.5 hours on a single charge. With the accompanying charging case, users can expect up to 38 hours of total playback time. The OpenFeel Mk2 earphones are available at an introductory price of 338 yuan, with some regions offering them for as low as 259 yuan after national subsidies.

Original source: ithome.com