Feature: 1. Dependable, without interference 2.4GHz signal operating. 2. Use only 4*AA batteries for transmitter. 3. Digital receiver system. 4. Quick and extremely stable in performance. 5. Simple binding procedure. Specification: Transmitter Specfications: Channels: 6 Model type: fixed wing/glider/helicopter RF range: 2.405-2.475GHz Bandwidth: 500KHz RF power: less than 20dBm 2.4G system: AFHDS 2A and AFHDS Code type: GFSK Sensitivity: 1024 Low voltage warning: less than 4.2V DSC port: output: PPM Charger port: no ANT length: 26mm * 2(dual antenna) Power: 6V 1.5AA * 4 Display mode: Transflective STN positive type, 128 * 64 VA72 * 39mm, white backlight. Size:174 * 89 * 190mm Weight: 392g Online update: yes Color: black Receiver Specifications: Channels: 6 Channels Model type: Airplane / Glider / Helicopter Frequency range: 2.4--2.48GHZ Band width number: 140 Transmitting power: not moer than 20dBm RX sensitivity: -105dBm 2.4G system: AFHDS 2A Code type: GFSK Antenna length: 26mm Input power: 4.0-6.5V DC Dimension: 40 * 21 * 7mm Weight: 6.4g Color: Black i-Bus interface: No Data acquisition interface: No. Package List: 1 * Transmitter 1 * Receiver 1 * Bind plug 1 * Chinese and English Instruction Manual