Check the listing for details. Williams Sound Digi-Wave Dlr 400 Alk Receiver DLR 400 ALK. Color: N/A, Condition: New. Listed at 237.00 USD. The Digi-Wave 400 system allows users to listen and talk to one another simultaneously and wirelessly for various group scenarios. Using the frequency-hopping algorithm, it avoids interference and is a very secure method of communication. A standard system requires at least one transceiver and one receiver. The DLR400ALK receiver has crystal-clear digital sound quality and supports unlimited listeners. Use with headsets, microphones (sold separately), or built-in speaker. Combinations of one or more DLT’s and DLR’s can be used to facilitate different events, depending on what needs to be spoken and what needs to be heard. Typical scenarios include:Guided Tours - one or more tour guides (2-way), with audience participation (2-way), or w/out audience participation (1-way)Language Interpretation - one or more interpreted languages transmitted to audience (1-way)Intercom - with up to six people able to speak simultaneously, and even more listeningHearing Assistance - featuring boosted audio for improved comprehension FeaturesCrystal-clear digital sound qualityUses (2) AAA Alkaline batteries for up to 30 hours of continuous use.Add any number of receivers to system to accommodate all different group sizes.Easy pairing and easy group join (for guest units)Typical range 325 feet3.5 mm TRRS jack with mono output. Use with earphones, headphones or neckloopBackward compatibility with Digi-Wave DLT300Portable -no base station or rack-mounted components required90-day warranty on accessories Return Policy Returns will not be accepted without a Return Merchandise Authorization Number (RMA). Refused Delivery: It will be subject to a 20% restocking fee. The customer will also be responsible for the return shipping cost incurred by the action of refusing the delivery. Consequently, amount of refund will be issued less 20% restocking fee of the value of the merchandise and less shipping and handling fees both ways. All shipping and handling fees are non-refundable with an exception where we have made an error by shipping and incorrect item to the customer.