In Japan, a 6-in-1 cylindrical Bluetooth speaker is available, and in the event of an emergency, it can be powered up using a hand crank.
Introducing the Rhythm Crankspeaker: A Multipurpose Device for Adventure and Emergency Preparedness
The Japanese company Rhythm has recently unveiled an innovative product, the Crankspeaker. This hand-crank powered device serves multiple functions, acting as a Bluetooth speaker, area light, LED flashlight, FM radio, and clock, making it a versatile tool for both casual entertainment and emergency situations.
The Crankspeaker boasts a compact, cylindrical design with the tactile control buttons placed on one side. The device measures 7.7 x 2.8 x 3.1 inches and weighs approximately 450g. The hand crank, which rests in the base when the device is placed vertically, is the primary source of power during emergencies or when grid power is not available.
The Crankspeaker's audio capabilities are impressive, with a 45 mm driver and a passive radiator ensuring crisp audio output. The built-in 4,000mAh rechargeable battery can provide up to 44 hours of audio playback, and can be charged via USB Type-C power supply or hand crank.
In terms of lighting, the flashlight on the Crankspeaker produces up to 95 lumens, while the area light offers 20 lumens of brightness. The LED flashlight can run for almost 50 hours, and the area light can last for more than a day.
The device also includes a digital display that shows the clock, alarm, battery percentage, and radio station. However, it is not specified how the Crankspeaker stays connected to communication networks during emergencies.
As of August 2025, the Crankspeaker is available for purchase from the Rakuten shop in Japan for approximately 14,800 yen (around $100). Unfortunately, there is no information or announcement regarding its availability outside Japan, including the U.S. or other international markets.
In conclusion, the Rhythm Crankspeaker is a unique and practical device that combines several essential functions into one compact and hand-crank powered device. While it is currently available only in Japan, its versatility and innovative design make it an exciting product to watch for those interested in adventure and emergency preparedness.
[1] Rakuten Shop - Crankspeaker Product Page [2] Rhythm Official Website - Crankspeaker Product Page [3] Rhythm Press Release - Introduction of the Crankspeaker [4] Rhythm FAQ - Crankspeaker Section
- The Crankspeaker, a multipurpose device from Rhythm, is not just a smart-home gadget or an entertainment gadget, but also a useful tool for adventure and emergency preparedness, particularly with its hand-crank power feature.
- This Rhythm Crankspeaker, boasting technology such as a Bluetooth speaker, area light, LED flashlight, FM radio, clock, and digital display, can be considered a versatile event tool, excelling in both casual entertainment and emergency situations.
