Wireless outdoor siren for Smart Security System 700. For acoustic and visual alarms. Very loud siren (105dB(A)/1m) and 3 brightly flashing LEDs. Radio frequency: 868MHz. Power supply: 4x 1.5V LR20 alkaline batteries (not included) and/or 5V DC via included plug-in power supply with 1.8m DC cable. Wall mounting using included fastening screws. Tamper-proof. Housing made of ABS, protection class: IP44. Dimensions: 130 x 246 x 91mm. Suitable accessories: DC extension cable VKD-6M.