KIDDE ceiling information siren, white colour and visual indicator (blue flash), completely wireless. includes visual indicator (blue flash). 32 tones., two-way communication 868 mhz., anti-tamper locking mechanism., 3 er14505m batteries of 3.6 v. output level 92 db(a), dimensions 110 x 94 mm (ø x d). weight 0.2 kg. cpr certification en54-13