1. Installation of 2 AAA batteries (not included), low power consumption, long time use, no need to replace batteries frequently
2. Environmentally friendly materials, safe to use
3. Cute design, simple operation
4. Channel:1CH
5. Working voltage: 2.0V-3.3V
6. Frequency: PMR:446.09375 MHz
7. Transmitting power: less than or equal to 0.05W
8. Modulation type: FM-F3E
9. TX frequency error: +/-1500Hz