Hp x351 300w ac power supply vision spare power supply 24 volt 3 amp for techaudio cs 1800p powered ceiling speakers laptop style transformer includes 4 x 05m figure 8 power cables ukeuusau dc tail length 4m transformer dimensions 120 x 52 x 32 mm includes 3 year onsite warranty uk only specification general device type power supply hot plug plug in module power device input voltage ac 100 240 v frequency required 5060 hz output voltage 12 v power capacity 300 watt di