Uncompromising performance capabilities - on stage, in the studio, even outdoors. Loaded with authentic keyboard sounds such as pianos, electric pianos, and organs, as well as many other sounds crucial for contemporary keyboard performance. Allows various combinations of three independent parts using layer and split functions, and features connectivity to an external keyboard, computer, or smartphone. With its built-in stereo speakers and battery operation capability, you can use the CK virtually anywhere you want. Intuitive controls for instant sound crafting. Features independent control sections for the filter, EG, and effects blocks. These are essential for dynamic sound-making, letting you tweak the sounds in real time as you perform. Built-in drawbars exclusively for real-time Organ Voice control - just as on an actual vintage organ. Single-button operation for enabling Portamento or unison sounds. Extensive support functions for creative performance. Convenient A/D INPUT jacks let you connect a microphone, and use exclusive built-in effects for the input. This is useful for singing and playing the keyboard in rehearsal or in small-group performances. Audio playback function via Bluetooth Audio connection enables performance along with playback of your favorite tunes or using background music from a Bluetooth-equipped device. Since the CK88 and CK61 are USB-compatible, connection with a computer or a smartphone is extremely quick and easy - a significant timesaver when setting up for video recording and online live streaming.     Control Interface Keyboard Number of Keys 88 Type GHS keyboard: matte black keytops Voices Tone Generation Tone Generating Technology AWM2, AWM (Organ Flutes) Polyphony Number of Polyphony (Max.) 128 Number of Live Set Sound 160 (Preset Live Set Sounds: 80) Number of Voices 363 Effects Types Insertion Effect Drive 1 system (5 types) / Effect 2 systems (1: 36 types, 2: 36 types) Delay 4 types Reverb 3 types Master EQ 3-band Connectivity Connectors Line Out [L/MONO]/[R] (6.3 mm, standard phone jacks, unbalanced) A/D INPUT [L/MONO]/[R] (6.3 mm, standard phone jacks) Headphones [PHONES] (6.3 mm, standard stereo phone jack) Foot Controller FOOT PEDAL [1]/[2] MIDI MIDI [IN]/[OUT] USB USB [TO HOST]/[TO DEVICE] DC IN [DC IN] Functions Bluetooth Yes (Audio Input) * May not have this functionality depending on the country USB audio interface [Sampling Frequency = 44.1 kHz] In: 2 channels (1 stereo channel) Out: 2 channels (1 stereo channel) Sound System Amplifiers 6 W × 2 Speakers (12 cm × 6 cm) × 2, Switchable ON/OFF Other Display Full Dot LCD (128 x 64 dots) Included Accessories AC adaptor*, Owner's Manual *May be included depending on your locale Power Supply Power Supply Adaptors PA-150B or an equivalent recommended by Yamaha (Output: DC 12V, 1.5 A) Batteries Eight "AA" size alkaline (LR6) or Ni-MH rechargeable batteries Power Consumption 11 W (When using PA-150B AC adaptor) Size/Weight Dimensions Width 1,333 mm (52-1/2") Height 148 mm (5-13/16") Depth 354 mm (13-15/16") Weight Weight 13.1 kg (28 lb 14 oz) (not including batteries) Packing Box Width 1,520 mm (59-13/16") Height 260 mm (10-1/4") Depth 480 mm (18-7/8")