GSM listening device in a battery   (ID: B18)

Mobile phones are so popular in our lives that a mobile phone battery, placed somewhere won't arouse any suspicion. This battery, however, is a listening device using the GSM mobile network operators. Insert the SIM card into the "battery" (to fit in the listening device you'll have to trim the end of the SIM card), then you dial the number and listen to all that is said near the device. This listening device works with SIM cards from all the mobile operators. The kit included universal charger. With it you can charge listening device and any other batteries for mobile phones.