SMJ 8 Socket 13 A Extension Lead & USB (Universal Serial Bus) Charger 2m White. This SMJ extension lead & USB (Universal Serial Bus) charger is suitable for interior use & features 8 sockets 2 USB (Universal Serial Bus) sockets & a 2m cable. Ideal for powering home appliances as well as charging small devices such as mobile phones. Surge protection & safety shuttered sockets provide additional safety.