Equipped with 3 EQ (Equalizer) modes. You can switch between three equalizers depending on your situation. For general audio outdoor. Standard mode for listening It can be used for audio books, podcasts, radios, etc. Humanized voice mode for listening And these ear buds are suitable for immersive listening to the music world. Lug Mode With the included earplugs (earplug) to listen to music in this mode, you can also find a plane or train. They are also great for playing movies and games at home. Specifications: Product Size (W x H x D): Approx. 4.3 x 5.2 x 1.8 inches (110 x 132 x 45 mm), Approx. 13.7 inches (348 mm) (Extended Length). Product Weight: 1.1 oz (29 g). Package size (W x H x D): Approx. 5.4 x 7.7 x 2.6 inches (136 x 196 x 67 mm) (hook included). Package Weight: Approx. 9.5 oz (266 g). Speaker type: Bone conduction method. Wireless Bluetooth Frequency response: 20Hz - 20,000Hz Sensitivity 100 ± 3dB Mic Characteristics - 40dB ± 3dB Bluetooth ver5.0 Supported Profiles: A2DP, AVRCP, HSP, HFP Up to 6 hours of battery life Charging Time: Approx. 2 hours. Bluetooth Range: Up to 32.8 ft (10 m) Package Includes: AfterShokz AIR main unit. Ear Plugs USB-C Cable (For Charging) Dedicated pouch Japanese Manual