Pro Logic SMX Alarms WTS 3 Receiver Extremely compact, the new SMX alarms have all the important features needed for the modern carp anglers and more. Extremely compact and elegant shape , it uses normal AAA 1.5v batteries. Totally waterproof, Prologic have used an evolution of the illuminated snag ears previously used in th SMW alarm, but with a substantial difference, on the SMX the illuminated snag ears are telescopic so mor compact and safe to store and more adaptable. Features for the Alarms include the following Operates with 2 AAA 1.5v batteries.not included Five volume level plus silent mode. Four sensitivity adjustments. Seven tone adjustments. 100 waterproof. Diamond shaped roller. Dedicated drop back LED indication. Dedicated drop back tone. Ultra bright LED. Features for the Receiver include the following Operates with 2 AAA 1.5v batteries.not included Memory function. Silent mode. Vibration mode. Dedicated LED for drop back indication. Courtesy night light. 100 waterproof.