SportDOG SD-1875 Transmitter Accessory Choice of continuous or momentary (nick) stimulation Compatible with: SD-425, SD-425S, SD-425CAMO, SD-825, SD-1825, SD-1825CAMO, SD-1875 Contents: Remote Transmitter, Antenna, Belt Clip and Lanyard Beeper Options: High Volume Beep, High Volume Hawk, Double High Beep, Bobwhite Quail Call, High Falling to Low Beep, Triple Beep, Double High Falling to Low Beep, Low Volume Beep, Low Volume Hawk Up to 7 stimulation levels