RoHS: yes. Component family: Piezo transmitter (buzzer) with built-in oscillator. Manufacturer's product group: PK. Type of circuits: piezo. Outside diameter [mm]: 24mm. External thickness [mm]: 10mm. Resonance frequency: 3kHz. Sound pressure [dB @ mm]: 80dB @ 30 cm. Minimum supply voltage (V): +1.5V. Maximum supply voltage (V): +30V. Operating temperature range min (°C): -20°C. Operating temperature range max (°C): +70°C