Feature: 1. BT digital electronic wind instrument can be connected to mobile phone APP to expand the infinite sound. 2. Supports 10 kinds of tone, 3 kinds of breath sensitivity, transpose function, octave adjustable; supports external headphone or speaker. 3. Built-in 800mAh lithium battery for strong endurance, easy to get recharged via DC 5V USB interface. 4. Environmental protection material, firm, durable oblate mouthpiece, more like a human mouth, improving playing comfort. 5. Compact and lightweight, easy to carry anywhere. Suitable for home, school, camping, picnic and so on. Specification: This is a digital electronic wind instrument with 10 kinds of professional tone to satisfy various needs. It supports external headphone or speaker to practice quietly without disturbing neighbor. It also can be connected to mobile phone APP to expand the infinite sound. Mini but multifunctional, it can be widely used at home or in many other places. Features: BT digital electronic wind instrument can be connected to mobile phone APP to expand the infinite sound. Supports 10 kinds of tone, 3 kinds of breath sensitivity, transpose function, octave adjustable; supports external headphone or speaker. Built-in 800mAh lithium battery for strong endurance, easy to get recharged via DC 5V USB interface. Environmental protection material, firm, oblate mouthpiece, more like a human mouth, improving playing comfort. Compact and lightweight, easy to carry anywhere. Suitable for home, school, camping, picnic and so on. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Black/ White (Optional) Material: ABS Tone: 10 Kinds External Headphone/ Speaker: Support Built-in Battery: 3.7V 800mAh Lithium Battery APP Download: Compatible with Logic/ Cubase Item Size: 342 * 37 * 26mm / 13.46 * 1.46 * 1.02in Package Size: 38.5 * 8.7 * 4cm / 15.16 * 3.43 * 1.57in Package Weight: 275g / 9.68oz Package List: 1 * Electronic Wind Instrument 2 * Mouthpiece 1 * USB Cable (Type-C) 1 * Pouch 1 * User Manual (English) Package List: 1 * Electronic Wind Instrument 2 * Mouthpiece 1 * USB Cable (Type-C) 1 * Pouch 1 * User Manual (English)