POC-DCK When a door or window alarm transmitter is required with longer transmission this kit provides a good solution. The compact transmitter (POC-DC) can be programmed to send location messages to the EM300 message displaying pager making it suitable for multiple door/window alarm requirements. Addition products ca be added to the kit including floor pressure mat alarm, long range waterproof call pendant, signal booster and customisable items. The transmitter is powered by a 3V Lithium long life battery (supplied) and has an On/Off switch. The pager is powered by 1 x AAA battery. Unlimited transmitters can be used with single or multiple pagers. EM300 Specifications ? 4 - lines message display (2 lines display in text zoom mode) ? pocsag paging (message sending) ? overall dimensions w 60mm h 42mm d 18mm ? display area 52mm x 28mm character height 6mm ? choice of 4 tones + vibration alert ? display back light ? low battery alert ? powered by 1 aaa battery (lasts 6 weeks based on 4 alerts per day) ? weight including battery 42.5g ? 8 paging addresses ? frequency 433.92mhz ? time & date display ? stores up to 20 messages ? time alarm ? supplied with battery and sturdy snap-on belt clip Door transmitter and pager kit (Default message Door Alarm)