In the words of Boss:

Experience the BOSS DM-2W Delay Waza Craft effects pedal! Ever since being discontinued way back in 1984, the BOSS DM-2 Delay pedal has remained highly sought after by players everywhere for its warm, bucket brigade analog delay tone. Now, the DM is back! With the Waza Craft DM-2W, the coveted stomp has been reborn with switchable sound modes and greater versatility for todays music styles. Using 100-percent analog circuitry, the DM-2Ws Standard mode nails the lush sound and 20-300 ms delay range of the original DM-2. Flipping into Custom mode instantly changes the sound character to a cleaner analog tone with over twice the available delay time.