Cherub

The metronome serves to denote the tempo at which a musical composition is to be performed.

The tempo of a mechanical metronome is controlled by an adjustable weight at the end of an inverted pendulum rod. To change the tempo, the weight can be moved up or down the pendulum rod. Because there is a second, fixed weight on the opposite side of the pendulum pivot, within the metronome box, this mechanism is also known as a double-weighted pendulum. The metronome's pendulum oscillates back and forth in time, and with each oscillation, a mechanism inside the device emits a clicking sound. Battery-free mechanical metronomes are powered by a spring-wound clockwork escapement.

Rechargeable Violin Tuner WMT – 665V by Cherub Specification: 

Metronome

• Beat: 0,1,2,3,4,5,6,7,8,9
• Tempo range: 30-250bpm
• Rhythm:
• Metronome Precision: ±0.3>#/p###
• Metronome sound: Mechanic, Cow Bell, Electronic, Vocal Count

Tuner

• Tuning range: A0(27.5Hz)-C8(4186.0Hz)
• Tuning mode: Chromatic,Violin, Viola, Cello, Double Bass
• A4 range: 430Hz-450Hz
• Precision: ±1cent 

Other Features

• Power: Built-in Rechargeable Li-Po Battery (3.7V, 150mAh)
• Battery Life(≈6.5 hour of tuning)
• Dimensions: 58mm(L) × 44mm(W) × 44mm(H)
• Weight: 40g

Be sure that you are always in tune. Vibration-based chromatic tuning system for acoustic and electric guitar, bass, ukulele or any other string instrument.  

Be sure that you are always in tune. Vibration-based chromatic tuning system for acoustic and electric guitar, bass, ukulele or any other string instrument.  

Chromatic Guitar Tuner WST-680 Moai Tune by Cherub Specifications: 

• Tuning range: A0(27.5Hz) ~ C8(4186Hz)
• Tuning mode: Chromatic, Guitar, Bass, Ukulele
• Tuning precision: ±1 cent
• A4 Value: 440Hz
• Detection method: Piezo(Clip)
• Power supply: Built-in rechargeable Li-Po battery
• Dimensions: 52mm(L) x 37mm(W) x 39mm(H)
• Weight: 33g

Be sure that you are always in tune. Vibration-based chromatic tuning system for acoustic and electric guitar, bass, ukulele or any other string instrument.  

Cherub ECH WST-645 is an easy-to-use clip-on tuner with featured Auto-on design that was originally invented by Cherub in 2013. Simply flip the tuner up to power it on, and push it down to turn it off. You can just leave it on the headstock and keep your instrument in tune in the simplest way.Cherub ECH WST-645 features 5 tuning modes: Chromatic, Guitar (Standard), Guitar (Compensated), Bass, and Ukulele.

Rechargeable Tuner for Guitar WST-551C by Cherub Specifications: 

• Tuning range: A0(27.5Hz)-C8(4186.0Hz)
• Tuning mode: Chromatic
• Precision: ±1cent
• Battery capacity: 3.7V, 150mAh
• Battery life time: 150 mins
• Dimensions: 53mm(L) × 49mm(W) × 16mm(H)
• Weight: 20.5g