Features: 100% Brand new and high quality Beautiful and smooth apperance design Intelligent logic control,anti-false alarm efficiently AUTO temperature compensation, suitable for various environment Specifications: Condition: new Working voltage: 110-220V alarm range:Natural gas: 10% ~ 25%LEL Liquefied petroleum gas: 10% ~ 25%LEL Coal gas: 2% ~ 5%LEL Alarm sound: > 65 dB (from 1m) Alarm mode: 1. transmission frequency: 315MHZ/433MHZ Transmission distance: open distance is not less than 120 meters 2. alarm output: normally open / normally closed optional Size:115*72*48mm Environment temperature: -10 degrees to 50 Relative temperature: 10% ~ 95% Colorwhite Weight230g power plug:US plug Package includes: 1 * Gas Leak Alarm 1 * power plug