Product size about : 12*8.3*6.2cm/4.7*3.2*2.4'' Product color: As shown in the figure Product material:ABS product features: 1. new and high quality 2. Made of high quality material, practical to use 3. Can be automatically identified and compatible 36V and 48V Voltage. 4. It will show the true reflection of the battery charge, real time recording of the power consumption to ensure riding mileage. 5. The individual joints are clearly set up to help with cost-effective installation. 6. When connected to a bicycle, this product will display a lot of useful data on your bike, such as riding speed, time, power and temperature. 7. The color display on the meter makes it easier for you to see the data on the panel. 8. The communication protocol of the display is Agreement 2 Instrument setting function Long press the up button and down button of the meter to enter the meter settings. P01: Backlight brightness, level 1 is the darkest, level 3 is the brightest. P02: mileage unit, 0: KM; 1: MILE. P03: Voltage level: 24V, 36V, 48V P04: Sleep time: 0, no sleep; other numbers are sleep time, range: 1-60; unit is minute. PO5: PAS level: 0, 3-level mode: 1-level 2V, 2-level 3V, 3-level 4V1, 5-level mode: 1-level 2V, 2-level 2.5V, 3-level 3V, 4-level 3.5V, 5-level 4V P06: wheel diameter: unit, inch; accuracy: 0.1. P07: Number of speed measuring magnets: range: 1-100. P08: Speed limit. Range: 0-50km/h, 50 means unlimited. No communication state (controlled by the meter): When the actual speed exceeds the speed we set, the meter will turn off the PWM output; when it is lower than the speed we set, the meter will automatically turn on the PWM output, and the driving speed is ±1km/h ; (Speed limit applies to PAS, not accelerator) Communication status (controlled by controller): The driving speed is consistent with the speed we set. Random error: ±1km/h. (Speed limits apply to PAS ) Note: These figures are based on KM. When changing KM to Mile, the speed value on the screen will automatically convert to the correct Miles, but if you don't change the speed limit setting from KM to Mile, it will be different from the actual speed limit in Mile. P09: Zero start, non-zero start setting, 0: zero start; 1: non-zero start. P10: Driving mode setting 0: Power-assisted driving (turning handle is invalid). 1: Electric drive (driven by turning the handle, at this time the power-assisted gear is invalid). 2: Power-assisted drive and electric drive coexist at the same time. P11: Assist sensitivity setting Range: 1-24. P12: Power boost start strength setting Range: 0-5. P13: The type of power-assisted magnets is set to 5, 8, and 12 magnets, among which 5 and 8 are single Hall power sensors, and 12 is used for dual Hall power sensors. P14: Current limit of the controller. The original current is 12A. Range: 1-20A P15: There is no such function. P16: ODO reset setting Long press the up button for 5 seconds ODO reset P17: 0: cruise not allowed, 1: cruise allowed; auto cruise optional (only valid for protocol 2) P18: Display speed scale range: 50%150%, P19:0 enable 0:0,1:0 P20: 0: 2 protocol 1: 5 S protocol 2: backup 3: backup Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pair