【Voltage Compatibility】 When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction. 【Plug Type】 Our products use Japanese plug types (A or B type). Please use a conversion adapter if necessary. 【Important Note on Transformers and Adapters】 A transformer adjusts voltage to match your device’s requirements. A conversion adapter only changes the plug shape and does not adjust voltage. Using only a conversion adapter without a transformer may result in damage to the product. 【Liability】 We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer. Customization of noise canceling, etc. is possible with a dedicated application. Comes with triple comfort earpieces/fitting supporters for excellent wearing comfort. Automatically turns on when taken out of the case Equipped with NFC, easy connection with one-touch pairing. You can activate your smartphone's voice assistant functions such as Siri/Google Now. Maximum communication distance: Line-of-sight distance approximately 10m Mass: Main body only (left and right each) approx. 6.8g Included items: USB cable, earpiece [Hybrid earpiece long SS, S, M, L (2 each), triple comfort earpiece S, M, L (2 each), fitting supporter M, L (2 each)], carrying case (charging case)