Multi-Link’s Cell Signal Amplifier connects directly to any M2M enabled cellular application or cellular device and provides up to 15dB gain in uplink signal strength (e.g. a router, modem, module, or gateway). The ML-CSA 3500 3G Cell Signal Amplifier is superior to other cell amplifiers & hi-gain antennas: Passive Bypass Technology is a fail-safe feature that is designed to allow the cell signal amplifier to bypass itself during loss of power, when a fault is detected, or when amplification is not needed. NO other device has this feature and it’s vital for applications that are mission-critical for safety, security & liability reasons, e.g. Fire & Security Alarms and Patient Monitoring. Auto Gain & Oscillation Control will automatically adjust the gain and output power to provide signal consistency if a signal anomaly occurs and to prevent interference with the Carrier’s network. If amplification is not needed, the booster goes into Passive Bypass Mode. Variable Input Power Ranges: +8.0 to 36.0 VDC which is beneficial for applications with a variety of power requirements. FCC & IC Certified and Carrier Pre-Approved