Check the listing for details. Qolsys QS1138-840 IQ Window Shock Sensor Encrypted 319.5Mhz Wireless. Condition: New. Listed at 49.99 USD. Qolsys QS1138-840 IQ Window Shock Sensor Encrypted 319.5Mhz Wireless Advanced Security LLC offers UL Alarm Monitoring Services starting at $15.00 per month or DIY Self-Monitoring Services starting at $10.00 per month, NO Contracts, NO Hidden Fees, & NO Activations Fees. Message or visit our website We are an Authorized Alarm DC, Qolsys, Honeywell Home, Resideo, AlarmNet, Ecolink, DSC, Telguard, SecureNet, Uplink, Alula, Bosch & 2GIG Security Dealer. We only sell Genuine Products, from authorized distributors . Not closeouts or old stock. Product Description The Qolsys QS1138-840 IQ Shock-S Sensor is an encrypted sensor with superior range specifically designed with multi-level vibration detection. It can alert you if a door is left open, automatically adjust your smart thermostat to save you energy, and provide security for anything that opens or closes. Know when these doors and windows are opened with customizable chimes and unique names spoken by the panels text-to-speech. Create personalized notifications and rules with the interactive app. SPECIFICATIONS -Frequency: 319.5MHz -Battery: 3V lithium CR123A -Magnet gap: 1 inch max -Operating Temperature: 32°-110°F (0°-45°C) -Operating Humidity: 5-85% RH non-condensing -Compatible with Qolsys control panels -Supervisory signal interval: 60 min (approximately) -Potentiometer: Shock sensitivity adjustment