@Karlo_nico23 They come with an Omni-directional antenna in the box.
For the MR series the antenna patterns are in the datasheets. As @NolanHerring said, for -E access points it'll be in the datasheet of the antenna.
For the MX I haven't seen antenna patterns yet, but I'd expect it to be more like a somewhat flattened sphere. In the up and down directions the signal will likely travel less far (assuming the antenna's are pointing upwards).