The Digi - Wave Tour Guide System 23 (1- Way) is an optimal enhancement for communication between the tour guide and group members. This wireless device will allow for the tour guide to combine his/her skills and speak to the group of up to 23 members. Additionally, with this device has the capability of overcoming the background noise and the group members will only have listen in capabilities. Features:Single-presenter/multiple-listener system expandable to multiple presenters/unlimited participantsCompletely portable no base station requiredEasy to use, push-to-talk functionalityFrequency-hopping technology subject to less interference, offers greater reliability in an array of tour group applications. Four independent tour groups can be operating simultaneously within a range of up to 200 feet outdoors/300 feet indoors (in 1- or 2-way mode, depending on environmental conditions). Outside of this range, other groups can be in operation.Legal for use in most countries.2-year-warrantyIncludes:1) DLT 300 transceiver*(20) DLR 360 receivers**(20) BAT 010-2 AAA alkaline batteries(1) MIC 044 2P headset microphone(20) EAR 022 surround earphones(1) CCS 044 silicone skin(1) CCS 030 DW 16 system carry case*Each DLT 300 is packaged with an individual charger.**Rechargeable batteries optional for DLR 360 receivers (BAT 022-2) - sold separately.