Anysun Home Security / Child Security Audio Surveillance build in CCD HD Camera and magnetic SIM Activated with Crystal Clear Sound Call to listen & take Video/picture App Support iPhone/Android The Anysun Z9 is the perfect home audio surveillance device. It's tiny and unobtrusive making it easy to conceal. Despite its' small size, it's a high quality security device, providing clear sound quality, long standby duration (around 2 days) and 1-2 hours constant use (extendable with a portable power-bank).also this we have build in HD Camera and strong magnet,that making it easy to put on the wall or desk . It works through a Mobile GSM SIM card (not supplied). Simply insert a PAYG / PrePay SIM into the device and call it to turn the device on, you will be able to hear what is happening in the surrounding area straight away. Perfect House Keeper ,Ideal Home Security Device. You can conceal the Z9 easily within your house so any potential thieves wouldn't know it was there. Set to voice activation and if the device hears anything it will call you. I.e. if somebody broke in and made noise, the device would pick this up and call you.the device also will text to you .then you can used the APP/command to take video and take picutre of the thieves. Anysun Z9 requires a GSM network (not CDMA) and runs off four GSM frequencies: 850/900/1800/1900 MHz. It works exactly like a mobile (with service / network reception etc. It will not work if the SIM card requires an IMEI number to activate it, as the Z9 does NOT have an IMEI number to enable this) This is also a baby monitor - Check that your children are sleeping soundly! You can also use to check up on your pets if you're away all day / worried about them - Versatile device - you can either call to listen OR you can set it to Voice Activation: when there is a sound above 45db within 10 metres of the device, you will be called to listen.