Second Hand CG Antenna PK-4 Pocket Keyer, a tiny and efficient power consumption electronic keyer, offers an Iambic keying with four message memories. The current drain is approximately 160 uA at 3V and can be continuously powered by a pair of UM4 batteries for several months. Four message buttons are mounted on the panel, and you can recall memorized messages quickly. Press one of the four buttons to remember the message. Four messages (1 - 4) are stored in a non-volatile EEPROM that keeps the contents without power. Message No.4 has an Auto-Repeat Message function with a programmable pause time. Keying Type Iambic B mode, Straight critical mode Keying speed Approx. 8 to 50 WPM Weight 4 selectable weight levels; 3 3.5 4 4.5 CW messages Message 1; 40 characters, (nonvolatile) Message 2; 20 characters, Message 3; 20 characters, Message 4; 40 characters, Auto-Repeat function, (Note: Above character numbers include space.) Sidetone Built-in piezo-electric speaker Power requirement 2.5 – 6V DC, typical 2 x AAA batteries.