| Call the number of buttons | 1ea |
| Propagation method / frequency | ST-200 FM 433MHz |
| Number Setting | Registration under the receiver ways to voice instruction |
| Antenna | PCB pattern antenna |
| Power | DC 3V / CR2025 * 1ea (battery) |
| Size | ￠59 × H8mm |
| Color | Red-black, Milky-wine |
| Weight | 20g |
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