NO NEED POWER Mobile Phone Signal Flash Light Radiation Power DIY Kit Arduino Projects robots NEW
1. power supply voltage: No need power supply;
2. sensing distance: 5cm(max);
3. PCB board size: 2.1cm*2.8cm;
4. range of application: mobile phone GSM signal.It is useless for PHS, fixed-line telephone,CDMA mobile phone.
5. time of application: calling or In a call ;