The APAMS-118 is an external GSM antenna intended for wireless communication systems. It supports dual-band operation, covering the 890-960 MHz (GSM900) and 1710-1880 MHz (GSM1800) frequency ranges. The antenna provides a gain of 2 dBi at 900 MHz and 3 dBi at 1800 MHz, with a 50 Ω impedance and a maximum VSWR of 2:1. Featuring linear polarization and an omni-directional azimuth, it ensures reliable performance across a wide operating temperature range of -45°C to +85°C. Its compact size and ease of installation make it suitable for applications such as GSM, GPRS, CDMA, UMTS, and vehicle monitoring.