Features: - Radio communication mode: bidirectional - Frequencies: 868WF - Programmable sound cycle time: 3, 5 or 10 minutes, 1 second (test use) - Programmable sound emission volume: low, medium and high - Alarm memory feedback - System status indications - Supervision - Opening protection - Programming dip-switch - Power supply: 4 alkaline batteries 1.5V type D - Battery life: 5 years (typical value, can vary according to use) - Output sound level: 110dB @ 1 meter - Operating temperature: -10°C + 45°C - Protection level: IP56 - Dimensions (L x H x D): 83.5 x 205 x 316.8 mm - Weight: 1.87 Kg