it will work upto 5-6 hours when battery is fully charged. : charge the device by micro usb charger cable to the power adapter.

: the device will automatically dial out to your number the moment it detects voice within its range. : make a call to the hidden microphone from the designated phone number and you will be able to listen in to conversations taking place within 6-8 feet range of the device. Hidden live listen technology voice recorder built-in rechargeable battery gsm sim slot call back one way communication for child, lectures, meetings, home office remote control room spy microphone audio bug device the 32gb (not included) memory card can capture a few months of audio recordings.

: insert a gsm sim with full jacket into the device, send an sms from your phone to sync the device with your phone number. ✅ : the device can also be used to record discussions at meetings, interviews, etc. : the device is easy to install, requires no installation software / cables / external battery.

Hidden voice recorder app