Reviews Security Protection Buzzer

10pcs DC 3V Active Buzzer Alarm Electromagnetic Beeper Active Piezo Buzzers Alarm Industrial Sounder 9x6mm/9x5.5mm

Type:5V Electromagnetic Active Buzzer, Material: ABS.
Rated Voltage: 5V, Operating Voltage: 4-8V, Rated Current (MAX): 30mA, Min Sound Output At 10cm: 85 dB, Resonant Frequency: 2300 +/- 300 Hz..
Uses: Active buzzer need only on the DC will beep,active buzzer internal oscillator..
High Quality: All multi-chip integrated circuits using gold wire ball bonding, complex production process, long life, stable performance, high rate of qualified products..
Package content:12pcs Electromagnetic Active Buzzer..

Advanced 16-channel video multiplexer mixer for real-time multi-channel display on one screen. Full duplex operation for displaying and recording all of its video channels simultaneously. Ideal for security monitoring or video preview application where multiple images are needed. Split-screen modes and PIP locations can be manually configured with ease by the front panel, IR remote or RS232 console..
16 individual input buttons for fast switching between each video input. 16 video pass-through ports. 3 video outputs including 2 composite BNC/RCA video outputs and 1 VGA out at 1024x768 for live viewing and recording. 4 audio inputs with 1 audio output..
16 screen mode options presented in 16/9/8/4/3-grid, quad screen, PIP, picture-by-picture style or single channel full screen. Easy selection for main channel, sub/PIP channel via front push buttons or IR remote for best suited visual presentation. Supports RS232 long range control and camera control by RS485 connection. Supports time/date stamp and auto sequential switching function with adjustable dwelling time..
Supports programmable motion detection area and sensitivity levels for each camera/input. Flexible external alarm input/output configurations. Supports automatic video loss detection, moti....

Advanced 16-channel video multiplexer mixer for real-time multi-channel display on one screen. Full duplex operation for displaying and recording all of its video channels simultaneously. Ideal for security monitoring or video preview application where multiple images are needed. Split-screen modes and PIP locations can be manually configured with ease by the front panel, IR remote or RS232 console. 16 individual input buttons for fast switching between each video input..
16 video pass-through ports. 3 video outputs including 2 composite BNC/RCA video outputs and 1 VGA out at 1024x768 for live viewing and recording. 4 audio inputs with 1 audio output. 16 screen mode options presented in 16/9/8/4/3-grid, quad screen, PIP, picture-by-picture style or single channel full screen. Easy selection for main channel, sub/PIP channel via front push buttons or IR remote for best suited visual presentation..
Supports RS232 long range control and camera control by RS485 connection. Supports time/date stamp and auto sequential switching function with adjustable dwelling time. Supports programmable motion detection area and sensitivity levels for each camera/input. Flexible external alarm input/output configurations. Supports automatic video loss detection, moti....

? Buzzer alarm button with light and sound tips. Increase the fun of the game, easy to use..
? Simply press the red buzzer to make it light up, it will buzz loudly..
? Actively encourage contestants to join in the competition with this buzzer. Response buzzers let competitors easily buzz when they have an answer..
? Powered by 4 x AA batteries(Not included in it). You will get a buzzer button with light and sound..
Size: app.11x9.7x12.2cm/4.33x3.82x4.8in(LxWxH).

With the built-in battery, it can work as a standard buzzer that controlled by transmitter or standalone buzzer that beeps loudly after the main battery has been ejected..
Super loudly that the volume can reach up to 110 dB..
The LED can flash automatically when the built-in light sensor detects the light darkness..
Two ways to disarm the buzzer, via the switcher on the buzzer or plug-in-out the quad battery..
Be compatible with both FPV quadcopter and RC Airplane..

Buzzer alarm button with light and sound tips. Increase the fun of the game, easy to use..
Actively encourage contestants to join in the competition with this buzzer. Response buzzers let competitors easily buzz when they have an answer..
Size: app.11x9.7x12.2 cm/4.33x3.82x4.8 in (L x W x H)..
Excellent for a funny prank, office desk gadget, gag gifts game buzzer, and can be Party Contest Prop Toy for Family, School, Friends Party..
Package includes: 4 x Game Answer Buzzer. Powered by 2 x AA batteries each (Not included)..

-iFlight fpv finder buzzer built in battery,it can automatically alarm, sound over 100db, which make it easy to find your drone..
-With dual LED, much brighter,easier to find your drone in the darkness..
-Mini upgrade version, lightweight and with smaller size of 18*17*15mm suit for 3-5inch fpv drone.
-The drone buzzer is compatible with traditional active buzzer, and all BF/CF flight controls.
-How to disarm the buzzer : disconnect main battery, hold disarm button on YR50B_S for 1-5 seconds then release..

Quality Component: Professional design, designed with a compass for easier and quicker tuning. Powered by the receiver, nice tool for campers..
Easy To Use: With an electronic buzzer, easy operation, LCD with backlight to show the satellite signal..
Accurate Measurement: This professional digital satellite detector is much more accurate than any other measuring equipment of its kind..
Useful Tool: Connect your LNB and receiver to the satellite finder to track the clearest setting for the satellite you wish to tune to..
Signal Alarm Buzzer: Built in 0Hz, 22KHz, 13V, 18V signal alarm buzzer, buzzer and damping control..