This SLx amplifier is designed to increase and distribute TV and FM aerial signals to up to six devices. Improves your TV picture especially in poor reception areas.Note: The use of the SLx Aerial Amplifier is recommended when you experience intermittent channel reception and pixelated images. Its use is not recommended when you receive no channels with your current set-up or when you live within a very short distance of you local TV transmitter, as it will cause the signal to overload. Note: It is not possible to view digital channels under weak signal strength conditions. Therefore, typically you will either receive digital channels with a clear picture and sound or you will not receive any channels at all.Sometimes, an insufficient digital signal can cause occasional blocking, freezing or complete loss of picture. The signal booster can help improve the signal but will not create a signal where none exists. If no signal is currently being received, try changing the aerialTry the following to improve the picture:1. Rotate the aerial.2. Position the aerial at greater or lesser distance from TV until optimum signal is received.3. Rescan for channels after trying each new positionIf a weak signal is present, customers should retune and rescan for channels once the signal booster is fitted.Box Contains1 x Amplifier, Instruction Manual