Features: -Display Unit: km/mph optional. -Plug & Play: After connect power supply, it will work directly, no need any other operation. Automatically turns on and off as the car starts and turns off. -Large Font: Clearly visible both during the day and at night. with sunshine hood itself, good review even under sun. -GPS+Beidou Dual Chips: Using 10 Hz high refresh rate, GPS + BeiDou dual-mode chip, car speed refresh fast, no delay. No skip speed, more coherent and smooth display. -Wide Application: Work on all cars / trucks / buses / E-scooters / E-bikes. -In the box: 1 x Main Host. 1 x USB Cable. 1 x Paste. 1 x User Manual. ( Car Charger Optional). Specifications: Notice: The Device is GPS Digital Speedometer, and speed is collected from satellites. So if tested at home or parking lot, perhaps speed can't display correctly. Please test it on the car outside with good signal. Item name: Speed Display Applicable cars: Universal Display unit: km/mph optional Type: GPS Speedometer Display color: Green Screen Type: LED Material: ABS+PC Item colour: Black Item size: Approx.80*54*31mm/3.15*2.13*1.22in Item weight: About 50g/1.76oz 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 +/- 10-30mm. Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.