Note: Before purchase, please ensure that your system uses the same frequency of unencrypted 125kHz. These items are universal 125kHz RFID key fob (key tag). Read only. Not rewritable. | Each key fob is pre-programmed with a unique ID number. The 10-digit number is engraved on the tag casing. | Compatible with other universal 125kHz tags like EM4100/4102. Not-compatible with encrypted tags like HID, Indala, Cobra, APCiK, Paradox, Radio, Honeywell, Kaba, Isonas, etc. | Suitable for 125kHz RFID proximity access control system and ID management system. For example, add it to your RFID door lock if applicable. | Wholesale, high quality, all key fobs come attached to key ring

4Ohm 5W Full Range Audio Speaker Stereo Woofer Loudspeaker | It will work well for home audio-visual equipment and other HiFi speakers. | Full range sound quality is good, low frequency also has very good performance, high cost performance, high sensitivity. | Suitable for DIY mini speaker/sound system and home audio-visual equipment and other HiFi speakers. | Rated Impedance: 4 Ohm

DC Brushless Cooling Fan, Rated Voltage: DC 5V, Current: 0.1A | Speed: 3000RPM; Air flow: 13.8CFM; Noise:26dBA; | 60 x 60 x 10mm Fans. Connector: 2 Terminal Connector with 2pin-ph2.5 | USB 60mm x 60mm x 10mm 6010 5V Brushless DC Cooling Fan | Compact motor design for computer case 60mm 3d Printer fan used in humidifier, aromatherapy and other small appliances series; small heat radiating communication equipment; military equipment; intelligent industrial control equipment plate cooling heat, high precision medical equipment cooling; pc cpu server cooling dissipation; electronic cooling fans and so on.

433mhz RF Transmitter and Receiver Superheterodyne UHF ASK Remote Control Switch Module For Arduino Wireless Diy Kit. | Mains input voltage range: 2.2V-5V; Operating frequency: 433.92 MHz, bandwidth of about ± 150KHz. | Low-power performance, along with high dynamic range (greater than 60dB). Module uses highly integrated chip, built front-end low-noise amplifier,Mixers, filters, frequency synthesizer circuit, etc., can maximize the signal optimization. | Support ASK / OOK modulation, the receiver sensitivity of -108dBm. | Applications: Can be used for wireless power switch, socket, remote control switch, receiver module, smart home products, remote control curtains, remote MP3, and so on.