This instrument is equipped with 4 buttons, from top to bottom: [Up/+/Headlight] (hereinafter referred to as [up] key), [Power/M menu] (hereinafter referred to as [M] key), [F function] (hereinafter referred to as [F] key),[Down/-](hereinafter referred to as the [Down]key). In the shutdown state: Long press the[M]key to turn on the meter: When the meter is turned on, the meter display first displays the model, then enters the self-diagnosis interface, at this time all the icons are displayed and the backlight is on, and it enters the normal display mode after 0.5 seconds.In the normal display mode: the meter displays information such as current speed, DST/ODO, power, mode, time, temperature, gear, and motor power; at this time: short press the [M] key to switch between DST and ODO; when there is an error alarm, it can Switch display error codeShort press[up]key to increase the gear position; Short press [Down]key to decrease the gear position; Short press[F]key to switch speed display mode: current speed/maximum speed/average speed; maximum. The speed is the maximum speed since the boot; the maximum speed and average speed will automatically return to the current speed after displaying for 5 secondsLong press [Up]key to switch the headlights; Long press [Down]key to switch between cruise (current speed greater than 6km/h) or 6km boost; long press. [Up+Down] key to enter the common parameter setting mode; Long press [F+Up+Down] key to enter the advanced parameter setting mode; the advanced parameter mode includes common.The parameters of the mode, and the protocol and password can also be modified.Long press [M] key to turn off; in normal mode, long press [F+Up] key to enter the riding time reset mode. The riding time flashes in this mode. At this time, long press the [Up]key to clear the riding time and single mileage DST; itwill exit to the normal mode without any operation within 20 seconds. In the parameter setting mode: the top part shows the current communication protocol, for example, "P-2" is the No. 2 protocol; the middle part is the parameter number;The following multi-function area scrolls to display the brief description of the parameter, which allows the user to distinguish the meaning of the parameter; the value of the parameter is displayed at the bottom. When the parameter value is numeric, the value is displayed to the right, and each digit will flash individually. At this time, the digit to be modified can be switched and the digit can be quickly increased or decreased; when the parameter is not numeric, it will flash together It is displayed on the left, and the option value can be switched up and down at this time.Model: SR800SType: SM connectorApplicable voltage: 24V, 36V, 48V, 52V, 60V, 72V.Compatible protocols are 2, 5S, KDS, Bafang v5.2, JLCD, APT 1.3Colour: blackMaterial: plasticPackage Contents:1 x LCD displayOnly the above package content, other products are not included.Note: Light shooting 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.