Frequency range: 402-470MHZ Code number: 8 group Type of reception: wide-band fixed frequency or Rate: 512bps, 1200bps, 2400 bps Sensitivity: -108DB @ 1200 bps -106DB @ 2400 bps Channel spacing: 25 KHz or 12.5KHz Frequency deviation: ± 4.5 KHz Stability: ± 10 PPM Adjacent channel selectivity: 55dB Mirror interference Suppression: ≥ 52dB Spurious rejection: 55dB Alarm sound: 75dB @ 12 feet Weight: 110 g (with battery) Size: 105mm*16mm Battery type: rechargeable lithium-ion battery Operating temperature:-10 ℃-50 ℃