TRK2XX Initiation Manual15 A battery subject to extremely low air pressure (low air pressure at high altitude) thatmay result in a explosion or the leakage of flammable liquid or gas WARNING: Never attempt to open the battery for any reason. If battery case is cracked ordamaged, do not insert into charger. Do not crush, drop or damage battery.11.Human interfacesThe TRK2XX devices have three different elements to interact with the user. The differentelements are: Button(SOS button): the first time that the TRK is on is used to perform the the keyprovisioning with the TRK. After it is used to report SOS function to the Inmolecularplatform.Figure 6 - Button position Buzzer: every time that the button is pressed there is feedback from the buzzer to indicateto the user that the button is being pressed. RGB LED: is used to indicate to the user various states: Blinking blue normal mode, just to indicate the correct behaviour of the TRK device. Blinking red: low battery, less than 10%. Blinking yellow: battery charging Static green: battery fully charged. Additionally in the autotest process, the possible led state indication could be. Blinking yellow: autotest in process, it only happens the first time that TRK powers ON. Static wait during two seconds: attaching to network failedSOS button