This Kewtech KEWCHECK103 240v Socket Tester with Audible Tone UK Plug is a reliable and efficient tool for testing electrical sockets in your home or office. As a Kewtech Agent, I can confirm the quality and durability of this product. It features a custom bundle and modified item of No, making it a standardised product that meets your testing needs. The tester is suitable for use in various settings, including business, office, and industrial environments. It is designed to provide accurate results with an audible tone when plugged into a functioning socket. This ensures that you can easily identify which sockets are working and which ones need to be replaced.