Maxell Bluetooth compatible completely wireless headphones in-ear MXH-BTW400BK

We offer a wide variety of products, and the following precautions apply to some of them. Please note that they are listed for all products. 【Voltage Compatibility】Designed for Japanese voltage (90-110V). Using with a different voltage may cause malfunction. 【Plug Type】Japanese plugs (A or B type). Use a conversion adapter if needed. 【Transformers & Adapters】Transformers adjust voltage; adapters only change plug shape. Using an adapter without a transformer may damage the product. 【Liability】We are not responsible for damages caused by improper use, such as using the product without a transformer. Model: Closed dynamic type Unit used: 6mm in diameter Playback frequency band: 20-20,000Hz Weight: Approx. 3.3g x 2, Charging case: Approx. 25g Power source: Built-in rechargeable lithium-ion battery