WST-650GB is a new product from Cherub Its designed for tuning Guitar and Bass. Its quick, accurate and stable Classic design offers a simple user interface Two 360joints and one 180joint allow any viewing angle Ultra wide and Bright LCD ensures excellent visibility even in dark environments Updated software guarantees real-time and fast tuning (response time: 30ms) Flat tuning allows for drop-tunings up to 4 semitones Energy-saving mode maximizes the battery life Built-in MIC and Piezo sensor ensure response even in noisy environments. Broad tuning range from A0 (27.50 Hz) to C8 (4186 Hz) Tuning mode: Guitar, Bass Tuning precision: +/- 1 cent A4 range: 410~490Hz Detection Method: Mic, Clip Display mode: LCD display Tuning method: Auto Power supply: 3V(CR2032)Lithium battery Sizes: 59(W)x18(D)x85(H)mm colour: black Material: ABS + electronic Package Contents: 1 x Guitar Tuner Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.