brand new and high quality Installation: 1.Please connet the C/O ring plug with ringer's jack. 2.The ringer's plug connet with telephone. 3.There are high,low switches for your selections. Features: 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. for 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! Specification: Material: Plastic Color: White Dimension: 97x57x26mm/ 3.82x2.24x1.02in Quantity: 1 Pc Note: 1.No retail package. 2.Please allow 0-1cm error due to manual measurement. plz make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Telephone Ringer