Specification
1. Material: ABS
1. Material: ABS
2. Sound: 75-85Db
3. Working range: 15-30 meters (open space)
4. Frequency: 433.92MHz
5. Battery: AAA×2pcs (transmitter, not included) CR2032 (1pc/receiver,included )
6. One transmitter, 4 receivers
7. Color: Black