It broadcasts on 101.9 MHz with an effective radiated power of 100 watts (class A1) using an omnidirectional antenna. The station also operates a co-channel repeater, CHAI-FM-1 in Candiac, also on 101.9 FM. The use of two transmitters is in order to protect several co-channel and adjacent-channel stations in nearby areas, the closest being CIBL-FM 101.5 and CINQ-FM 102.3 in Montreal, plus co-channel CJSS-FM 101.9 in Cornwall, Ontario.
In December 2015, CHAI-FM announced plans to replace its two-transmitter system with a single transmitter, from a location southeast of CHAI-FM's main Châteauguay transmitter. The new transmitter would broadcast at 238 watts, with a directional antenna set on an east-west pattern, also to protect nearby stations as discussed above; this was due to synchronization and interference problems between the Châteauguay and Candiac transmitters, which is evident where the two transmitters overlap in an area between Lachine and Delson.
- CHAI-FM history - Canadian Communications Foundation
- Query the REC's Canadian station database for CHAI-FM
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