Usage Tips:Model: SW900 Voltage type: 24~48V Applicable motor: 250-350W Instrument setting function: Long press the up and down buttons of the instrument to enter the instrument 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: : 0, no sleep; other numbers are , range: 1-60; unit minute. P05: Assist gear 1-9 P06: Wheel diameter: unit, inch; precision: 0.1. P07: Number of speed measuring magnets: Range: 1-100. P08: Speed limit: speed percentage range 0-100%, 100 means speed 100%. P09: Zero start, non-zero start setting, 0: zero start; 1: non-zero start. P10: Drive mode setting 0: Power-assisted drive (the handle is invalid). 1: Electric drive (drive through the handlebar, at this time the assist gear is invalid). 2: Power-assisted drive and electric drive coexist at the same time. P11: Assist sensitivity setting range: 1-24. P12: Assist start intensity setting range: 0-5. P13: Power-assisted magnet type setting There are three types of 5, 8, and 12 magnets, of which 5 and 8 are single-Hall power-assisted sensors. Setting 12 is for the use of dual Hall power-assisted sensors. P14: No such function temporarily. P15: No such function temporarily. P16: ODO reset setting Long press the up button for 5 seconds ODO reset Colour: Black+Silver Material: composite material Package Contents: 1 x controller 1 x display meter 1 x Connecting line Only the above package content, other products are not included. Note: Light 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.