The tempo range is 40-208bpm, and a tuning reference tone is included. Also features a choice of internal speaker or headphone listening. Key Features: - Tempo range: 40 â 208 (39 steps) - Tone generation: A4 = 440Hz Bb4=466.16Hz - Terminal: earphone jack - Tempo sound: Two different tones - Terminal: earphone jack - Power: 9V dry battery
Battery Capacity(mAh): 10001-15000mAh Battery Type: Li-polymer Battery Output Interface: Single USB Output: 5V/2.1A Quality Certification: CE,RoHS,UL,PCT,SASO,NEMKO,CCC Input Interface: Micro USB Supports Solar Energy: No Is LED Lamp Illumination: No Support Quick Charge Technology: One-way Quick Charge Type: Emergency / Portable Size: 11 x 6.6 x 1cm/4.3 x 2.6 x 0.4 inches (L x W x H) Capacity: 12000mAh USB charging cable: Yes
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