It is a signature edition With a battery level display A 360-degree knob also functions as a button Attention: The latest firmware is supported, and the current firmware is firmware V2.0.2 by default. Improvements of H4MS: Single power on/off switch: When powered off, the battery no longer phantom drain, meaning the device can be completely powered off. Advanced battery management IC and battery display: The screen can display the battery level, including percentage, voltage, and current/draw. It is easier to check the battery level. Matte screen: This matte screen helps you see the content of the screen more clearly in sunny outdoor environments. 360-degree knob and button: The knob button has been redesigned to a flat form, returning to for the -style click wheel. It is more convenient to use the knob. GPIO port: The H4MS adds a GPIO port, allowing users to create their own add-ons for the H4MS, similar to the . This is a major and a feature in previous versions of Portapack. Improved charging speeds: The H4MS improves both the charging quality and speed. Microphone on/off switch: It allows you to turn the microphone on or off. Automatic sound switching between headphones and speakers: When you plug in the headphones, the H4MS automatically switch from speaker mode to headset mode. This is a feature in previous versions of Portapack. Note: Battery is included. The H4MS needs to be turned on in order to charge. Color: White Material: ABS Package Contents: 1 * Portapack H4MS (The appearance of the board is sent randomly and cannot be specified) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.