See datasheet for specifications.

Antenna covering 868 MHz, GSM 900 (880-960 MHz) and GSM 1800, 1900 (1710-1990 MHz) for inside mounting on non-conductive surfaces such as plastic and the antenna includes adhesives for attaching.

InSide GSM is a ground plane independent antenna including coaxial cable with U.FL or MMCX connector and are supplied with or without adhesive. The antenna might need to be retuned to give optimum performance.