1. Supports long-distance one-way o transmission (two sets required for two-way communication) or o signal transmission from devices such as mobile phones and MP3 players, with o reception at the receiving end. 2. Operates on the principle of using infrared laser to transmit sound by converting o signals into modulated laser light; the receiver's photodiode detects the laser vibrations and demodulates the signal to restore sound. 3. Transmission range up to 50–100 meters, suitable for creating long-distance wireless o systems. Series: Laser Wireless o Transmission Kit Model: Laser Wireless o Transmission Kit Application: Educational electronics project, DIY electronic kit, teaching and training for electronic technology Package: Parts only Color: Green Material: Plastic Size: 4 x 2.2 cm Package Contents: 1 x Laser Wireless o Transmission Kit Note: The color may vary slightly due to lighting and display differences. Measurement error allowed within +/- 1–3 cm.