Lacava Bathroom Products | ZOOM | Electronic Faucet & Soap Dispenser -- Electronic lavatory faucet (item # EX10) for cold or premixed water. Power via battery or 9V transformer. Recommended mixing valves sold reparately: EX20 or EX25. Electronic deck-mounted touch-free soap dispenser (item # EX05). Power via battery or 9V transformer. Peristaltic pump allows the use of any brand of soap, sanitizer or lotion.