Flashing light alerts you of incoming calls in quiet environments. It has a light and switch to select between a high and low frequency ringer sound. The switch has 2 positions: One for the high frequency ringer sound and the other for the lower frequency ringer sound. Easy to easy. Operates with simple connection to phone line. Ideal solution for the hard of hearing, or for use in noisy environments, indeed anywhere indoors. Telephone Ringer only, other accessories demo in the picture are not included! Installation: 1.Please connet the C/O ring plug with ringers jack. 2.The ringers plug connet with telephone. 3.There are high,low switches for your selections. Colour:White Material:plastic Size:97x57x26mm/ 3.82x2.24x1.02inch Package Contents: 1 x Telephone Ringer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-