The GSM audio transmitter GSM-IR enables you to eavesdrop, along with environment conversations, also those (both outgoing and incoming) carried out via landline phone. When the phone places or receives a call, it is automatically forwarded on your cellphone, so that you can listen to the conversation. Audio quality is absolutely flawless, as GSM-IR is equipped with a super-sensitive miniaturized outer microphone, capable of recording a wide array of sounds, especially speech frequencies. Microphone sensitivity can be set according to your needs, with no decrease in signal quality, and all this works at unlimited distance thanks to the GSM technology! Thanks to an infrared sensor, which can detect even the smallest motion or vibration, GSM-IR can activate automatically, whenever it hears a voice or someone enters its range. Under this point of view, users can set the GSM Bug to different levels of sensitivity according to his needs, simply by sending an SMS! GSM-IR, just like other GSM Bugs in our catalogue, can in fact be programmed remotely, by sending specific SMS commands. For environmental eavesdropping, all you have to do is call the SIM card phone number, sit back and listen! Furthermore, through its motion/conversation detector, can inform you via SMS, or to call you automatically on up to three numbers previously set, allowing you to listen to a conversation without having to do absolutely anything, as GSM-IR will take care of everything! Technical Specifications Triband GSM 900/1800/1900 Unlimited distance eavesdropping Ultra-sensitive high quality microphone InfraRed and vibration sensors Can be connected to landline phone for eavesdropping of all incoming and outgoing calls Automatic activation when landline phone is in use Voice detection sensitivity can be programmed Automatic call and SMS reporting to preset numbers (up to 3) Remotely operated and controlled via SMS Low battery SMS alert One button for all functions Battery life: Up to 72 hours standby, and 3 hours operation 5V Battery Charger/Transformer In-built lithium 3.6V rechargeable battery Size: 60 x 40 x 20 mm Weight: 45 g Package contains:   GSM Bug External Microphone Lithium rechargeable battery IR Sensor Battery Charger/Transformer