The Tianlang TR1898 music doorbell manual provides features, electrical specifications, and an application diagram for installation and use.
The TR1898 music doorbell offers 16 selectable tones and two operation modes: K1 for single‑play and K2 for simultaneous play. It is designed for doorbell systems with low power consumption and high stability.
The manual lists the electrical characteristics, including a typical operating voltage of 3.0 V, operating current of 0.28 A, no‑load current of 1.0 A, output current of 2.0 mA, and an oscillator frequency of 1.0 MHz. An application diagram shows how the device connects within a doorbell system. This manual is written in Chinese.
| Operating Voltage (typical) | 3.0 V |
|---|---|
| Operating Current | 0.28 A |
| No‑load Current | 1.0 A |
| Output Current (VO) | 2.0 mA |
| Oscillator Frequency | 1.0 MHz |
| Oscillator Resistor | 1.0 MΩ |
The typical operating voltage is 3.0 V.