Profile: CWR Electronics offers automotive products. Our products include cellular amplifiers, fume detectors, inverters, satellite receivers and magnetic components. The PowerMax™ 3 watt dual band cellular amplifier is a bi-directional amplifier that features dynamic variable gain control to regulate the output to any cell carriers tower. It can be used with digital cellular phones that operate using CDMA, TDMA, PCS, GSM 850 and GSM 1900. The DA4000E cell amplifier has 3 watt dual band cellular signal amplifier, 12 VDC cigarette style power cable, and 2' of DA240 coaxial cable with mini-UHF male connectors.