Product Description<br><br><br>Active Buzzer Alarm Module<br><br>Passive buzzer is characterized by:<br>1. A passive internal sources without shocks  so if the DC signal can not make it with a tweet. Must 2K ~ 5K square wave to drive it<br>2. Sound frequency controllable  you can make a "Do Lai Mi Fa Suo La Xi" effect<br>3. In some special cases  you can reuse a console with LED<br><br>Active buzzer is characterized by:(OUR PRODUCT)<br>1. An active internal buzzer with shock source  so long as a power be called<br>2. Program easy to control  SCM' high and low level can bring sounds  while passive buzzer can not.<br> <br><br>Module description:<br>1. Using 9012 transistor drive<br>2. Operating voltage: 3.3V-5V<br>3. With fixed bolt hole for easy installation<br>4. Small plates PCB size: 2.8cm * 1.3cm<br> <br><br>Module interface specification (3-wire) 1. External 3.3V-5V voltage (can be connected to 5V SCM and 3.3v SCM directly)<br>2. External GND<br>3. External SCM IO port<br><br>Color: show as pictures<br>PLS NOTE that due to lighting effects  monitor's brightness / contrast settings etc  there could be some slight differences in the color tone of the pictures and the actual item!<br><br><br>3 x For Dupont cable(20cm)<br>The 1 module adopts S8050 transistor drive<br>2 working voltage 3.3V-5V<br>The 3 is provided with a fixed bolt hole  convenient installation<br>4 small size: 3.2cm * 1.3cm PCB<br>5 when the I/O port input high level  buzzer<br>The two module interface description (3 wire)<br>1 VCC 3.3V-5V (external voltage can be directly connected with 5V and 3.3V microcontroller)<br>2 GND external GND<br>3 I/O external microcontroller IO port<br><img src="//gdetail.image-gmkt.com/030/717423496/2016/4/04cd09c2-37c7-493b-a9e3-3c36abbd89d2.jpg"  width="591" height="536" onerror="this.src='http://gdetail.image-gmkt.com/030/717423496/2016/4/04cd09c2-37c7-493b-a9e3-3c36abbd89d2.jpg'; $(this).attr('onerror'，'');" ><br><img src="//gdetail.image-gmkt.com/030/717423496/2016/4/915bfe6f-fed8-4123-a33d-e66403dd42bc.jpg"  onerror="this.src='http://gdetail.image-gmkt.com/030/717423496/2016/4/915bfe6f-fed8-4123-a33d-e66403dd42bc.jpg'; $(this).attr('onerror'，'');" ><br><br><br>Package Included:<br>1x Active Buzzer Alarm Module<br>3 x For Dupont cable(20cm)<br>Packaging Details<br>Unit Type: piece Package Weight: 0.100kg (0.22lb.) Package Size: 15cm x 8cm x 10cm (5.91in x 3.15in x 3.94in)